|This film article is a stub. You can help Wikiquote by expanding it.|
- Dr. Bartlett: But I don't have a parachute!
- Mr. Olympus: Then you have a problem.
- Mr. Stallwood: But I don't have a parachute either!
- Mr. Olympus: Then you have the same problem.
- Dr. Wilson: You? That's you?
- Jake: Well, it isn't the mouse.
- Dr. Wilson: But your lips aren't moving! You're not... speaking.
- Jake: Thought transference. Nothing exceptional where I come from.
- Ronnie Schell: Sgt. Duffy/Voice of Jake
- Ken Berry: Dr. Franklin "Frank" Wilson
- Sandy Duncan: Dr. Elizabeth "Liz" Bartlett
- Harry Morgan: Gen. Stilton
- Roddy McDowall: Mr. Stallwood
- McLean Stevenson: Dr. Norman Link
- Jesse White: Earnest Ernie (the Gambling Dealer)
- Alan Young: Dr. Winger (veterinarian)
- Hans Conried: Chief Dr. Heffel
- James Hampton: Capt. Anderson
- Howard Platt: Col. Woodruff
- William Prince: Mr. Charlie Olympus
- Ralph Manza: Weasel
- Tom Pedi: Honest Harry
- Hank Jones: Officer
- Sorrell Brooke: Judge
- Fred Whalen: Sarasota Slim (Pool Hustler)