Movies That Use the "Lets Slingshot Around Planet/star to Go Somewhere" Plot Point. (Spoilers)
When "Beam me up, Scotty!" will not suffice and good 'ol gravitational assist will. List them here!
- •Star Trek IV: The Voyage Home (1986)Kirk, Spock and co. slingshot around the Sun to travel back in time and kidnap humpback whales that will decide the fate of future Earth.
- •The Martian (2015)Crew that left Matt Damon behind on Mars feel guilty and slingshot around Earth to go back and rescue him.
- •Appolo 13, it's just a moon instead of a planetSuggested by @beanybeans