The trailer for The Martian provides context about the film's plot, characters, and genre. It establishes that the main character, played by Matt Damon, is stranded alone on Mars after being presumed dead. Through humor and determination, he works to survive until the next NASA rescue mission in 4 years, though he only has enough food for 50 days. Shots of Mars and the characters in space suits signal that the film is a science fiction story. The trailer builds suspense around how the main character will survive until help arrives.