(tense music) - Cassie has really changed over these four seasons.
I found it very moving to see this woman who was so accomplished at her job, and so committed to it, being overwhelmed by it.
They have not one single idea what doing this job does to a person, having to mop up the blood, and the tears, and the rage, and the despair on a daily basis, you don't often see that in procedural dramas, heroes in police dramas often seem to be unbelievably heroic.
You see over the four seasons, the emotional toll on Cassie.
- She starts off in season one as a very straight playing seeker after justice and then in season two that attitude towards justice was slightly changed by the suspect who clearly had been punished enough by life, and she let them go, and she's still dealing with the encounter with absolute evil in season three, which shook her sense of her own ability to deal with these awful things.
- And as the series have progressed, Cassie has come under increasing pressure.
- She's disillusioned with the police force that she's worked so hard for and believes so passionately in.
- As long as we're not trying to settle scores here.
- There is a small bit of me who wants to punish someone.
- He recognizes that she has a fragile state that she needs to kind of be involved to feel relevant.
And so, I think he is concerned about her.
You've got a lot of things going on for you at the moment.
I just think we need to tread carefully.
Why don't we sleep on it, talk about it in the morning.
- She arrives back saying, look, I'm just not going to get, I'm not going to get too emotionally involved, just going to do my job these three months and get my pension and she says that knowing that won't be possible, but they go forward and of course she gets involved, that's just in her makeup, I have to stay now, John, I have to see this case through now.
(tense music)
