“You have to accept that there are certain things you won't understand right away.”

Michael O'Neill - Tom Banachek

“- Judy Witwicky: I think that if there really was some kind of alien infestation the Government would be the first to tell us.
- Ron Witwicky: This is America.
- Judy Witwicky: That's how we know we're in a free country. There's no secrets.”
Julie White - Judy Witwicky
Kevin Dunn - Ron Witwicky

“- Reporter: We've been hearing rumors about the Icarus space program. What's the big secret?
- Gustav Graves: It's not a secret, it's a surprise.”
Alan Bond - Reporter
Toby Stephens - Gustav Graves

“- Bill Sullivan: I see this as America's eyes and ears; I don't want it to become its heart and soul. So I told the president for this to work there is going to have to be some kind of civilian oversight.
- Edward Wilson: Oversight? How can you have a covert organization if you have people looking over your shoulder?”

Robert De Niro - Bill Sullivan
Matt Damon - Edward Wilson

“Greville Wynne-This is unexpected. I can’t believe I’m actually having lunch with spies. I’m just a salesman.
Emily Donovan-Exactly. You’re a civilian, so the KGB won’t be watching.
Dickie Franks-It would be a real service to Great Britain.
Greville Wynne-What would you want me to do?”
Benedict Cumberbatch - Greville Wynne
Rachel Brosnahan - Emily Donovan
Angus Wright - Dickie Franks