I also liked Heros.
And that one about the nuclear thing...can't remember it's name.
Also...if you are ok with Death and documentaries and seeing people die..'the Bridge' is a fascinating, appalling, and genuinely moving documentary made by people who filmed the Golden Gate Bridge for a year and filmed the people committing suicide, talking to the fiends and family. Honestly, sounds awful but it was fantastic. Obviously not one for everyone though.
Also seriously interesting and sad was the film/docu about a woman who died in Wood Green and wasn't found for 3 years...it was made by advertising in the paper for people who knew this woman and talking to them...it's nothing like what you imagine...and it gets to you.
Both on netflix. Heartily recommend if you are alright with the subject matter.