Ron Howard's film Apollo 13 is a great telling of the adventure of NASA's third manned mission to land on the moon, in 1970. Being a Hollywood movie, it of course makes changes in fact to highten drama and increase the story telling.
This is pointed out in Universe Today's article which summarises NASA's November 6 2001 interview with Ken Mattingly.
My point in saying this is not to detract from the movie: it's a great movie, and I enjoyed watching it. I just feel that there is so much more to explore in the mission, and to look at how things really were planned and thought out — even the lifeboat procedures and testing of the revival and re-entry had been thought about, not made up on the spot, though it was extensively revised.
Today I'm looking more closely into Mattingly's involvement in the mission. It's fascinating, and as a support engineer myself, I find it very inspiring.