- What a beautiful night!

The stars, the moon, the sun...

Wait, the sun?

- So it's day?

- But it's night!

- Day!

- ...and night.

- After this message thingy.

- What a crazy day.

Uh, night?

(strumming ukulele) - (together): ♪♪ Peg plus Cat - Our names are Peg and Cat ♪ - ♪ Peg plus Cat - There's no denying that ♪ - ♪ One, two, one, two, three, four, five, six ♪ - ♪ One, two, one, two, three, four, five, six ♪ - ♪ And seven, eight ♪ - ♪ Five, six and seven, eight - Five, six and seven, eight ♪ - ♪ Seven, eight and - (Peg): Nine ♪ - ♪ Eight and nine, then at last it's finally time for ♪ - ♪ (Cat): Ten - ♪ One, two, three, four, five, six, seven, eight, nine, then comes ♪ - ♪ Ten (repeating) - ♪ Then comes - (Peg): Ten ♪ - (all): ♪ Ten Peg Plus Cat ♪♪ Woo-hoo!

- (Cat): Ha ha ha!

- ♪ The magic uke ♪ - ♪ Ukulele ♪ - ♪ Uke - Ukulele ♪ - Whatever you call it, it rocks!

(string music playing) (cat meowing) (dog barking) ♪♪ I'm making plants And Cat is making balls ♪ ♪ I think I'll trim a tree ♪ ♪ Now each side is the same as the other side ♪ ♪ And that is symmetry ♪ - (together): ♪ And that is symmetry ♪ - ♪ And what is symmetry ♪ - ♪ You pick up a shape and you hold it ♪ ♪ If it lines up just right when you fold it ♪ ♪ We're doing it both, him and me ♪ - ♪ So that's what you call symmetry ♪ - (together): ♪ So that's what you call symmetry ♪ - Huh?

- ♪ A dragon - A dragon ♪ - ♪ A dragon - I'll gobble them ♪ - ♪ A dragon - A dragon ♪ - ♪ We've got a-- - (dragon): --big problem ♪ - ♪ He's near - And nearer ♪ - ♪ He's here ♪ - And here-RRR!

- ♪ Let's go outside and run and hide ♪ - ♪ You'll never hide from me outside ♪ - ♪ You need to run and hide you say, then touch my hand ♪ ♪ And fly away - (Peg and Cat): OK ♪ - Whoa!

- (Peg and Cat): Whoa!

- ♪ (sprites): From the dragon you are free ♪ ♪ Your problem's solved as solved can be ♪♪ - So thanks for saving us, Mrs., um-- - I am the Queen of the Night.

These are my Sprites of Night, and that is the Temple of Night.

Can you tell I'm in love with night?

- Really?

Night?

You?

- (Cat): I had no idea!

- When the sky is dark but the moon and stars glow...

I love every hour of night.

At five or six o'clock you get to have dinner... - Dinner can be very tasty.

- Yeah!

- At seven or eight, you're getting ready for bed... - Brushin' your teeth.

- Brushy-brushy!

- By nine or ten you're sleeping, right through eleven and twelve midnight.

- And after twelve, the numbers go back to one and start over again, right?

It goes one, two, three o'clock... - And everyone keeps right on sleeping when it's four o'clock, five, six... 'Til the sun rises, and night turns into...DAY!

- OK... Well, we should be getting to bed ourselves now, right, Cat?

Cat?

I can't find Cat!

I've got a-- - (sprites): ♪ --really big problem ♪ (playing ominous trumpet flourish) - There was someone with you?

- (Peg): You didn't notice Cat 'cause I'm always saying stuff and he doesn't say much, and cause he's a lot smaller than me.

We're different in a ton of ways.

But I really miss that quiet little guy!

- I think I know who took your friend!

- Who?

- The same person who sent a dragon after you!

♪♪ The King of Day My enemy, I fear him ♪ - He lives over there?

- ♪ He won't let me near him ♪ ♪ You could get to him I'm sure ♪ - Me?

- ♪ Go set Cat free ♪ ♪ Go snatch him from my sunny, sunny neighbour ♪ ♪ Then do the Queen of Night a little favour ♪ ♪ To punish him ♪ ♪ For all he's done before ♪ - OK... - ♪ Get very, very near ♪ - Uh-huh... - ♪ And laugh right in his ear ♪ - Laugh in his ear?

- ♪ Go ha ha ha ha ha ha ha ha ♪ - That would punish him alright!

- ♪ Ha ha ha ha ha ha ha ha ♪ - ♪ So I'm counting ♪ - ♪ Ha ha ha ha ha ha ha ha - One, two, three, four, five, six, seven, eight ♪ - ♪ One, two, three, four, five, six, seven, eight ♪ - ♪ Give him that from ♪ ♪ The Queen of the Night ♪ - I gotta climb those stairs, right?

And then go... - ♪ Ha ha ha ha ha ha ha ha ♪ - ♪ Can I just get Cat and skip the ha ha ha ha ha ♪ - ♪ No no no no no Ha ha ha ha ha ha ha ha ♪ - ♪ One, two, three, four, five, six, seven, eight ♪ - ♪ Eight loud "ha"s ♪ ♪ From the Queen of the Night ♪♪ - Got it!

- Yo, call off your bats and owls, Your Night-ness!

- My creatures of the night will move away from a step if you walk along its line of symmetry.

- Its what?

(snapping fingers) - (sprites): ♪ The line of symmetry's the name ♪ ♪ Of the line that makes both sides the same ♪ - The line of symmetry goes right down the middle.

- It can go up and down... - It can go straight across... - It can go from the top on one side to the bottom on the other!

- But I don't see a line down the middle of any of these shapes.

(snapping) - ♪ You'll find the lines and walk across them gayly ♪ ♪ If you play this magic ukulele ♪ - A uke with magic powers?

Alrighty, Miss Nighty!

(ukulele makes the sounds of many instruments) This baby sounds good!

There's the line of symmetry on that moon shape!

When I walk along the line of symmetry, the bats and owls move and groove.

- (sprites): ♪ You solved the mysterious riddle ♪ ♪ That line going right down the middle ♪ ♪ You're crossing each moon and each star ♪ ♪ You've reached the King's wall, here you are ♪ - (Peg): Whoa!

- ♪♪ Welcome here, where it's clear and it's light out ♪ ♪ Come and stay in the day, shut the night out ♪ ♪ Have a ball where it always is bright out ♪ ♪ Play and sing in the kingdom of day ♪ - Ramone?

You're working for the King of Day?

- I tame his tigers.

(tiger roaring) - (Ramone): Sit!

(purring) - So, Mr. King of Day, you seem like a really nice guy, but the Queen of Night told me that-- - ♪ I did not send that dragon, No, she did ♪ - Why would the Queen send a dragon?

- ♪ To get you to come here To get me, kid ♪ - She said you have Cat.

- ♪ I brought Cat over here to be free, kid ♪ ♪ Free from night so in light He could play ♪ - (together): ♪ In the glorious Kingdom of Day ♪♪ - (Peg): So where's Cat hanging out?

- Not here, on the side of the temple dedicated to morning.

- So at five or six, the sun's rising and you might still be asleep, but by seven it's definitely morning and you're getting up.

Eight and nine and ten o'clock are morning times too... - Cat's not on the side dedicated to lunch time.

- Eleven o'clock, twelve noon, and then just like at twelve midnight, the numbers start over again.

One, two, three, four o'clock... - He should be here, on the side dedicated to that time of day after noon called "afternoon".

- Cat?

- (Cat): Peg-arino!

I'm riding a tiger!

Ha ha!

- Cat and I are so different!

I have, like, zero interest in riding a tiger, but Cat's totally into flipping up and-- - (Cat): Ahh!

- --over the wall?

(banging on door) Come on back in, Ca-- Ahh!

- You !

♪ Ha ha ha ha ♪ - ♪ Ho ho ho ho - Ha ha ha ha ♪ - I hate to interrupt your laughing, but-- - ♪ You used your dragon to get this kid up here to scare me ♪ - Could one of you-- - ♪ You're always getting ♪ ♪ Light on my side It's so annoying ♪ - Help me find Cat?

- ♪ Darkness is boring ♪ - Oh, well.

I can get Cat without them, long as I've got my magic uke to show me the lines of symmetry on the steps.

(playing magic ukulele) - (King of Day): ♪ You threw a moon at me?

Who does that ♪ - ♪ You bumped me with a sun ♪ - ♪ You gave me a noogie with an asteroid ♪ - Without that door there's way too much light!

I can't see the lines of symmetry on the steps.

- Please help me!

- ♪ Your bats and owls ♪ ♪ Are creepy!

- Excuse me ♪ ♪ You keep tigers, tigers ♪ - There's nobody to help me.

I'll never reach Cat!

I am totally freaking-- (ukulele strumming) - Magic uke?

Are you trying to tell me something?

(playing flourish) - I can find a line of symmetry myself by just folding the shape?

(playing different flourish) - And if both sides are the same, the line I folded it along is the line of symmetry?

(strumming rapidly) That is one smart musical instrument!

♪ When I fold it this way it's not even ♪ - (sprites): ♪ Don't give up Keep on believin' ♪ - ♪ Now both sides line up perfectly ♪ - ♪ You've found the line of symmetry ♪ - ♪ Folding is the key ♪ - ♪ To finding lines of symmetry ♪ - Made it to the Land of Night.

- ♪♪ Cuh, cuh Cat ♪ - (Cat): ♪ Puh, puh Peg ♪ - ♪ Cuh-cuh-cuh Cat - Puh-puh-puh Peg ♪ - ♪ Cuh-cuh-cuh-cuh-cuh Cat - Puh-puh-puh-puh-puh Peg ♪ - ♪ Cuh-cuh-cuh-cuh Cat - Puh-puh-puh-puh Peg ♪ - ♪ Cuh-cuh-cuh-cuh Cat - Puh-puh-puh-puh Peg - ♪ Lines of symmetry helped me find you ♪ - ♪ Math is great, let me remind you ♪ - ♪ You solved your problem - Everything is really awesome ♪ - ♪ Problem solved - Imagine that ♪ - ♪ They are so happy ♪ - Puh-puh Peg and Cat!

- ♪ Peg and Cat ♪♪ - (Queen and King): ♪ Ha ha ha ♪ - Chill out, you two!

- ♪♪ Day and night are really different ♪ ♪ But you don't have to feud ♪ ♪ Cat and I are really different ♪ ♪ But he's my favorite dude - You're different ♪ - (Peg): Yes ♪ - (King): You like her ♪ - (Cat): Yes ♪ - (Queen): ♪ You like him - (Peg): Yes ♪ - (King): ♪ You're different - (Peg and Cat): Yes, yes, yes ♪ - ♪ I make tree shapes He makes circles ♪ ♪ We are different sizes - Very ♪ - ♪ I have skin - And I'm all furry ♪ - ♪ Still we're major friends for life ♪ - ♪ Day is light - And sun is shining ♪ - ♪ Night is dark - And folks are dining ♪ - ♪ She likes moon shapes - He likes sun shapes ♪ - ♪ Still we could be friends for life ♪ - ♪ Be my husband - Be my wife ♪ - Uh, what?

- Day and night are getting married!

- Oh!

Cool.

- ♪ Night has midnight ♪ ♪ Day has noon ♪ - ♪ Day has sun and night has moon ♪ - ♪ Day has breakfast, lunch time too ♪ - ♪ Night has dinnertime for you ♪ - ♪ Night is dark, day is light - Night is fine and day's alright ♪ - ♪ Night's for sleep and day's for play ♪ - ♪ Night's alright, day's OK Night's alright, day's OK ♪♪ (Peg strumming) (cat humming) (magic ukulele playing brass sounds) - (Cat): Hmm?

Hmm... Hmm?

(playing on its own) (strumming and humming) (both laughing) (tooting) - ♪ We're splashing in the♪♪ - One, two, a one, two, three, four!

- ♪♪ Peg plus Cat ♪ ♪ Peg plus Cat ♪ - (chorus): ♪ One, two, three - Yeah!

Come on, let's go ♪ - ♪ Four, five, six - Hey!

What do you know ♪ - ♪ Seven, eight, nine - Whoa!

What comes next ♪ - Uh, ten?

- ♪ Ten!

You're the best ♪ - ♪ We are two Na na na na na ♪ ♪ Me plus you Na na na na na ♪ ♪ We're Peg plus - Cat ♪ - ♪ Peg plus - Cat ♪ - Peg plus - Cat ♪♪ - Peg plus Cat!

(both laughing) (crashing cymbals) (yelping) (twittering) - You are not going to believe this, but today I, Peg, am making instruments out of...junk!

(strumming ukulele) - And I'm making instruments out of me.

- And as we play these cool instruments, we're going to totally rock out...in three.

- Totally rockin' in three!

...Say what?

- Usually, we play music in four.

That means we use a musical pattern where the beat goes... One, two, three, four... - (both): One, two, three, four!

- But when you're playing in three, the beat goes one, two, three... ♪♪♪ - (birds) ♪ Tweet tweet tweet ♪ - One, two, three One, two, three.

- ♪ You can dance and sing and shake your thing ♪ ♪ In one, two, three In one, two, three ♪ - (Cat): ♪ I can waltz and groove and really move ♪ ♪ In one, two, three One, two, three ♪ - ♪ Smooth and nimbly skipping simply ♪ - ♪ In lovely - (all): One, two, three ♪♪ (twanging) - Whoa!

- My string broke!

Without a string to strum, I can't play music in three or four or anything!

This is a big problem!

- Yeah!

Whoa... OK... Wahoo!

- That's it, you up-down, over-and-around genius!

- Huh?

- (Peg): You went flying up... - Way away from the ground.

- Then down... - Right back towards the ground.

- Up and down are opposites, Cat.

That means they're totally different.

- Then I went over you... - Right up over my head onto that wheel, and then you went in circles around the wheel.

- And how does all that make me a genius?

- Because we can move this old wire in those four ways to replace the string on my uke.

Check it out!

- First we'll pull the wire up, and then we'll pull this end down.

- Up and down!

- Next we'll bring it over this knobby thingy, and then we'll wrap it around.

- Round and around and around... Yeah!

- We fixed my uke, and so... (strumming rapidly) - Can we change things up and sing it in three?

- Go for it, Cat!

- ♪ One, two, three, One, two, three ♪ - ♪ Tweet tweet tweet - Problem solved ♪ ♪ The problem is solved ♪ ♪ We solved the problem ♪ ♪ Problem solved ♪ (tinkling musically) - Whoa-ho-ho-ho-ho!

- Coolest junk instrument ever!

Was it made by a famous instrument maker, or aliens, or... (blowing raspberries) - Baby Fox?

- Whoa, baby!

(instrument clanging and tooting musically) (birds singing along) - ♪♪ (Ludwig): Help me, help me, help me, help me, please ♪ ♪ Help me, please Help me, please ♪ - (Peg): Ludwig Van Beethoven!

- ♪ I am stuck up in the airy air ♪ ♪ And swinging by my derriere ♪ ♪ Help me, help me, help me, help me please ♪ ♪ Help me, please Help me, please ♪ - How did you get stuck up there, Ludwig?

- ♪ I got tripped up and then I flopped ♪ ♪ Upon that pot Then down I dropped ♪ - ♪ And now you're stuck.

- Yes I'm stuck, stinky luck ♪ ♪ Oh, phooey yuck I'm stuck ♪♪ - Peg und Cat!

I came to jam with the cute baby that goes... (blowing raspberries) ...but then I tripped and got all tangled up in this stuff!

- Don't worry Ludwig, we'll climb up there... (instrument honking and tooting) ...and balance on this thingy, un-hook your bottom and get you free... Whoa!

- (Peg and Cat): Ahh!

- (Cat): We did not get you free.

- You got yourselves stuck.

- And now we've all got a... - (all): ...really big problem!

- Oh, well.

- Cat, why are you just lying there?

- He said we're stuck!

That means we can't do anything, right?

- Being stuck is a part of solving a problem, Cat.

It doesn't mean you're done, it means you're just getting started.

So come on everybody, think!

(playing piano) - You too, Ludwig!

- Music helps me think.

- (Peg): Yes!

That's it!

Baby Fox isn't stuck, so he can help us.

- We just need to get him to climb up and move just the right pieces to set us free.

(giggling) - Uh... Good luck with that.

- Now you're thinking, Cat.

That lever makes the bucket go up and down.

- Huh?

- If you push up... - (Ludwig): ...the bucket will go down!

- Hey Baby Fox, wanna go for a ride?

(babbling) - (chuckling) Elevator music!

- (Peg): ♪ Going up up uppity up up up ♪ - (Baby Fox): Hi... (Cat laughing) - Ho-ho!

That tickles.

- You genius baby!

When you tickle Cat, he moves pieces over other pieces.

- And why is that good?

- 'Cause if you keep moving pieces, you just might move them the right way to get us untangled!

- Oh, oh!

Peg!

Will it help even more if I move the pieces a different way, too?

Yeah?

- (Peg): Great idea, Ludwig!

The more different ways we move pieces, the better!

So you push pieces up, and I'll pull pieces down, while Baby Fox tickles Cat... (both laughing) ...to keep him moving pieces over!

- Genius!

- And since we're moving pieces three different ways, we can use the three-beat musical pattern.

One, two, three!

One, two, three!

- ♪ Pushing up - Pulling down ♪ - ♪ Pushing over, ha ha ♪ - ♪ Pushing up - Pulling down ♪ - ♪ Pushing over, tra la ♪ - It's working!

We'll be free in no time - just like those pieces!

- (Cat): Shiny triangles!

(Baby Fox blowing raspberries) - They make me think of our pink barnyard friend... - Who is totally crazy about triangles... (Peg and Cat gasping) - (Peg and Cat): The Pig!

- ♪ Triangles ♪ ♪ One, two, three ♪ ♪ The perfect shape ♪ ♪ For me ♪ - (all): Whoa... Yay!

...Aw!

- (Cat): We're stuck again!

So now can we give up?

- No way!

Now we try even harder.

- Huh?

- On the way to solving some problems, you get stuck a lot.

So you keep thinking, keep pushing, keep trying 'til you solve the problem, and you're totally unstuck for good!

Let's look on the bright side.

Now we have another friend to join us on our quest to get out of here.

- (Cat): Uh, right... - (Ludwig): OK... - Help me out here!

- ♪ Down and around ♪ - (Ludwig and Cat): Down and around?

- ♪ Down and around ♪ - (Peg): The Pig has an idea!

Something to do with down and around... (playing gentle piano music) - (chuckling): Down and around music.

- Hmmm... Maybe if we push down... - ...or twist around?

(Baby Fox giggling) (Big Mouth grunting) - (Peg): Baby Fox is down there, being chased all around!

- (Cat): By Big Mouth!

- (Ludwig): Chase music!

- Big Mouth loves little yellow things.

That little yellow hat makes Baby Fox like candy to him.

If we don't get unstuck soon to help Baby Fox, he'll be Big Mouth's snack!

- True that!

- Hurry, everybody!

Pull up, down, and over in three.

- Um, for the record, we, uh, tried that!

- Try harder!

...Down!

- Up!

- Over!

- Up!

- Down!

...We're getting almost untangled, but we're still tangled.

We're not quite free.

And now even I am... ...totally freaking out!

(blowing whistle) - Cat's right.

I'll count in that three beat pattern to calm down.

One, two, three, one, two, three.

- One, two, three, four, one, two, three four.

- That's it, you genius pattern-changing Cat!

- Huh?

- Moving stuff three different ways almost gets us free.

So moving stuff four ways might do the trick!

What do you say we move pieces up down over and around?

- (Ludwig): While moving pieces four ways, could we do it in four?

- For sure!

- (Cat): Let's rock!

- (laughing): That's the spirit, Cat.

- Ya-ha!

Rocking out in four music!

(grunting and giggling) - On the count of four, we'll move pieces up down and over, and Pig, you move pieces around.

- One, two, three, four!

- Up!

- Down!

- Over - Around!

- (Cat): Game over, Big Mouth!

- Drats!

(babbling) - Baby Fox doesn't like seeing Big Mouth sad, so he's making him a little yellow horn.

(babbling) (blowing horn) - (all): Aww!

- (Big Mouth): Aww... - Since we knew musical patterns, and up, down, over and around, we got free and saved Baby Fox.

- Math can get you unstuck for good!

- And so... - ♪♪ Problem solved The problem is solved ♪ ♪ We solved the problem - So everything is awesome ♪ - ♪ Problem solved ♪♪ - Hey, everybody, wanna jam?

- I'm in!

- Uh-huh!

- Oh, yeah!

- Oh...

If only we had a conductor to help us keep the beat.

- (Ramone): Did somebody say "conductor"?

- (Peg): Ramone?

- (Ludwig): Perfect timing!

- I know, right?

- Okay everybody, in three!

- One, two, three, one, two, three... - (Peg and Cat): ♪♪ Here we all will jam and be-bop slam ♪ - (Ludwig and Ramone): ♪ In one, two, three, in one, two, three ♪ - ♪ And we have to say it's fun to play ♪ - ♪ In one, two, three In one, two, three ♪ - ♪ Yes, our junky toys Make groovy noise ♪ - ♪ In one, two, three In one, two, three ♪ - (Pig): ♪ Hear me ting-a-ting And ring and sing ♪ - ♪ In one, two, three In one, two, three ♪ - (Cat): ♪ Hey, look at me I'm wild and free ♪ ♪ In one, two, three Woop-de-dee ♪ - ♪ Whoa-ho-ho-ho Go me ♪ - (Peg): ♪ Cat's so very quick And really slick ♪ - ♪ In one, two, three In one, two, three ♪ - ♪ It's clear I didn't end up on my rear ♪ - ♪ In one, two, three In one, two, three ♪ - Whoa!

...Huh?

- (Peg): Uh-oh!

- (Ramone): Oh, no!

- (Ludwig): Wee-ha!

- Wee-ha!

- ♪ Now let's really, really, really rock ♪ - ♪ Knock knock knock block Tick tick tick tock ♪ - ♪ And now for you we have completely rocked ♪ ♪ In one, two, three In one, two, three ♪♪ - ...Ow!

- You gotta admit, the Pig was actually pretty helpful this time.

- I can't believe it.

- Cat, come on!

He totally showed us that Baby Fox was in trouble down below.

- I won't believe it; no way, no how.

The Pig is not helpful.

It's just not who he is.

The Pig is the Pig... - ♪ Down ♪ - (gasping): Down!

- Whoa-ha-whoa-ho!

- ♪ Down.

(both laughing) (instrumental theme song playing) Closed Captioning by SETTE inc. ♪♪ (giggle) - For more Peg-- - And Cat!

- Go to pbskids.org.