I have such a bad memory, but off the top of my head:
- The deep fat fryer scene
- The entire eerie exercise episode, will never stop loving it
- When the Irish man tells Tom there's a bomb in his house, with Ellie and Maisie inside
- The Anthony Stewart Head character, when he meets Tom and makes the little speech and then at the end when he kills himself
- Tom shooting Harry/swimming
- The scene where Tom says 'It's like it's stopped raining in my head"
- Danny's death
- Adam and Jo being held, the recording of Zaf screaming, it really set my teeth of edge
- Jo and her speech about women and war. Her talking about the bird, asking Adam to kill her
- Jo's obsessive running after what happened to her
- Fiona's death
- Lucas in the bathroom, with his tattoos on display - it just fascinated me/the story behind them
- Ros telling Jo about it being different for women in the service
- Harry being held/interrogated/drugged
- The nightmare/flashback scenes where Lucas thinks about hanging himself
- The whole episode with Oleg Darshavin - their relationship at the beginning of the ep was almost stockholm syndrome/love
- The scene where the bloke talks to Lucas and asks him how it's been being Lucas, and then he says 'See you, John' or whatever it is. I only just recently watched this and I'm still shocked!