I cannot recommend enough the BBC docudrama Space Odyssey.

Astronomy now, the december issue has an article about it. Actors have flown in a Russian cargo plane simulating weightlessness; the producers (same as those for "Walking with Dinosaurs") have had advice from David Scott and Jean-Pierre Haignere. Everything is based on current knowledge (planets, astronauts psychology, etc..).
Two notes: if a crew visits a comet, it'd better do it outside of the snow border (otherwise they get all the dust and ice from the comet).
SF very often sacrifices one member of the crew for drama purposes (or all of them except one); but experience shows that in reality either the whole crew comes back intact or the whole crew dies.

Raoul