“- Otto: Are you telling me you don't have a social security number?
- Beldar Conehead: Correct.
- Otto: Why not?
- Beldar Conehead: I am an illegal alien.”
Sinbad - Otto
Dan Aykroyd - Beldar Conehead

“I can't fill up a space shuttle with geriatrics!”
James Cromwell - Bob Gerson

“- Jim McConnell: There's pressure in here.
- Terri Fisher: Above Mars atmospheric? That's impossible.
- Jim McConnell: We're millions of miles from Earth inside a giant white face. What's impossible?”
Gary Sinise - Jim McConnell
Connie Nielsen - Terri Fisher

“There's a lot of space out there to get lost in.”
William Hurt - Prof. John Robinson

- Darren Woods: [about "beings" on other planets] Maybe it's a bunch of Amazon rainforest women that wanna breed a new race.
- Wolfgang Müller: You pervert.
Jason Presson - Darren Woods
River Phoenix - Wolfgang Müller