The great thing about this show is a lot of the original film music has made it into the show almost verbatim.

So you're really hearing the iconic themes so many people have grown to love.

You hear them onstage live each night, which is so exciting.

♪♪ My name is Ted Arthur, and I'm the music director for "Back to the Future."

Great Scott!

Good evening.

This is Dr. Emmett L. Brown, and this is my time machine.

A time machine?!

[ "Johnny B. Goode" plays ] Arthur: The music director is in charge of all things music, including conducting the show, playing the show, and maintaining the musical integrity of the show from night to night.

I really think that the music to "Back to the Future" is unlike any other show that is currently on Broadway.

We have 18 musicians in the pit.

For Broadway standards, that's pretty big, but you need that many musicians to really make this epic score come to life.

♪ A country boy named Johnny B. Goode ♪ Arthur: There are things that we play each night in the show that you've never heard on a Broadway stage.

We're doing '80s pop.

We're doing '50s rock.

We're doing film score, underscore, and that's what's so exciting.

It's great to work with that varied styles of music with so many musicians.

♪♪ You're a slacker, McFly!

This story is so epic in its storytelling, as far as the themes.

You know, he goes back in time and meets his parents.

1955?!

And it's told through multiple generations.

Hey, McFly, I thought I told you never to come in here.

If they don't meet, they won't fall in love, they won't get married, and neither you nor your siblings will ever be born.

Whoa.

It does capture that feeling of nostalgia of the first time you saw it in the theaters.

And just the reactions -- I mean, people cheering for all the iconic lines, all of the music.

So, this has a real personal connection to people that I have not experienced in any other show I've worked on.

♪♪ I have to say that this is the largest production that I've ever been a part of.

I mean, the technical elements in this show are so complex and take so many people behind the scenes ensuring that it goes off well, but also goes off safely.

And it's really incredible how it all comes together.

[ Theme from "Back to the Future" plays ] ♪♪ I remember as a kid being in my bedroom, just conducting to film scores, just in the mirror, just for fun, and I'm thinking, oh, my gosh, I wanted to do that one day.

And so getting to do that each night, conducting 18 live musicians in this epic score, and looking up and seeing the scenes play out right in front of me, it just feels like you're in the movie.

It's such an exciting and exhilarating experience every night, every night.

I came here almost 10 years ago and didn't know anybody and wanted to work on Broadway and work on a Broadway show, and with a lot of perseverance and tenacity, I am able to do that today, and so I really take that to heart.

We are Broadway.

♪♪