Bloody hell. That was quite something. I don't think I breathed at all for the last 30 minutes! What an amazing episode.
The scene with Trish and Dennis was absolutely heartbreaking. I think the thing that really made it for me though was Kev's complete and utter confusion when he learned the truth. He hadn't a clue what to do. I actually thought the psychiatrist worked really well in these scenes, any more would have spoilt the effect.
I particularly loved the pacing this episode, the cuts between the intense emotional scenes and the quieter moments were very well done.
Everyone's already said it, but the acting was superb. Jamie was utterly, believably all over the place and Taron Egarton was superb. I can't even begin to imagine what that must have taken out of them, but I suspect TE"s comment that it was a "complete nightmare" is something of an understatement!