Anwar's father accepting Maxxie's homosexuality in the Series 1 finale.
It's a fucking stupid, messed up world. I've got my God; he speaks to me every day. Some things I just can't work out, so I leave them be. Okay? Even if I think they're wrong. Because I know, one day he'll make me understand. I've got that trust; it's called belief. I'm a lucky man.
Chris's Anguished Declaration of Love to Jal toward the end of his S2 episode, complete with a history of his sad life and how she is the first one to make him feel like it's all worth it.
Chris's funeral in the S2 finale.
The Series 2 finale "Everyone," where Tony, during a tearful goodbye to Sid who is about to leave for New York to find Cassie, kisses his best friend on the forehead and tells him "I always loved you the best".
Various moments between Naomi and Emily, but particularly this exchange as Naomi bikes away from the lake:
Emily: Naomi? No! You fucking... No! Stop right now. Don't you dare leave me in your bed again!
Naomi: I-I got to go...
Emily: I know you, Naomi! I know that you're lonely! I think that you need someone to want you! Well, I do want you! So... please... be brave and want me back!
The scenes in Freddie's Season 4 episode when he tries to make Effy feel better by taking her out in a rickshaw and spending the day in the park looking after and playing with her. It doesn't really work in the end,what with Effy trying to commit suicide later, but still, the thought was there, it was genuinely sweet, and she really did seem happier for a while.
Katie's Series 4 episode when the Fitch family reunites and has one last dinner together as a family in the home they've just lost. Also from that episode, Katie holding Emily's hand and comforting her after their fight at Naomi's barbecue.
Earlier than that, when Katie turns to her sister's girlfriend for mercy:
Katie:...We need somewhre to stay... your house is pretty empty at the moment...
Katie: Oh, but it is! Because it is Emily's problem. She's your girlfriend, which makes it your problem.
Naomi: [Long Beat] ...No lesbian digs?
Katie: [Tries to suppress a smile] That I can't promise.
The reuniting of Thomas and Pandora (potentially) in the S4 Finale.
Naomi's full confession to Emily in the S4 finale.
"You're beautiful." "No, I'm not, I'm a worthless shit-magnet!" "Then why do I see a glorious fucking head-fuck thing?"
The pool scene from series 5 episode 1, where having been rejected by Mini, Franky is walking down the street... when Grace, Alo and Rich pull her into a van and take her to a disused pool to welcome her to Bristol.