Don Knotts
Roy Fleming
Leslie Nielsen
Major Fred Gifford
Joan Freeman
Ellie Jackson
Jesse White
Donelli
Jeanette Nolan
Mrs. Fleming
Frank McGrath
Plank
Arthur O'Connell
Arbuckle "Buck" Fleming
Joan Shawlee
Blonde in Bar
Guy Raymond
Bert
Nydia Westman
Aunt Zana
Paul Hartman
Rush
Robert F. Simon
Cervantes
Robert Pickering
Moran
Bill Quinn
Captain Ferguson
Melissa Gilbert
Niece
Burt Mustin
Ned
Marjorie Bennett
Sweetwater Citizen at Mailbox
Herb Vigran
NASA Doctor
Paul Bryar
First Bus Driver (uncredited)