A tribute to the triumphs of science, teamwork, and the human spirit. Watney believes in his mind and what he knows about science to get him through each day and to keep him alive until NASA can send help. The NASA and JPL scientists and Chinese space program work together to help Watney. Courage and perseverance are important themes.
Perilous scenes of the Ares 3 crew's evacuation and when Watney is struck and vanishes. Later he has to remove a part that impaled him in the chest and staple the bloody wound shut. He survives again and again as things blow up and injure but don't kill him. His weight loss becomes startling by the end of the movie. Rescue scenes are scary and tense.
It's not sexual, but there's one shot of Watney rail-thin and naked from behind. One kiss.
Watney curses fairly often, as does NASA communications officer Annie. Words used include one "f--k," plus "s--t," "a--hole," "damn," etc.