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Ken Berry as Frank |
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Sandy Duncan as Liz |
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Harry Morgan as General Stilton |
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Roddy McDowall as Mr. Stallwood |
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McLean Stevenson as Link |
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Jesse White as Earnest Ernie |
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Alan Young as Dr. Wenger |
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Hans Conried as Dr. Heffel |
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Ronnie Schell as Jake (Voice) / Sgt. Duffy |
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James Hampton as Capt. Anderson |
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Howard Platt as Col. Woodruff |
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William Prince as Mr. Olympus |
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Ralph Manza as Weasel |
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Tom Pedi as Honest Harry |
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Hank Jones as Officer |
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Rick Hurst as Dydee Guard |
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John Alderson as Mr. Smith |
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Tiger Joe Marsh as Omar |
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Arnold Soboloff as NASA Executive |
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Mel Carter as 1st Soldier |
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Dal McKennon as Farmer |
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Alice Backes as Farmer's Wife |
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Henry Slate as Sandwich Man |
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Roger Pancake as Red |
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Roger Price as 1st E.R.L. Expert |
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Jerry Fujikawa as 2nd E.R.L. Expert |
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Jim Begg as Dydee Driver |
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Peter Renaday as Bailiff |
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Rickie Sorensen as Technician |
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Tom Jackman as Army Engineer |
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Fred L. Whalen as Sarasota Slim |
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Joseph G. Medalis as Sucker |
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Gil Stratton as 1st NASA Scientist |
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Jana Milo as 2nd NASA Scientist |
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Sorrell Booke as Presiding Judge (uncredited) |
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Jackson Bostwick as Additional Voices (voice) (uncredited) |
| Production | Ron Miller | Producer |
| Directing | Norman Tokar | Director |
| Writing | Ted Key | Writer |
| Art | E. Preston Ames | Art Direction |
| Production | John D. Bloss | Production Manager |
| Art | Bob McLing | Assistant Property Master |
| Editing | Cotton Warburton | Editor |
| Art | John B. Mansbridge | Art Direction |
| Directing | Bill Carroll | Second Assistant Director |
| Sound | Lyndsey Schenk | Foley Mixer |
| Costume & Make-Up | Emily Sundby | Costume Design |
| Production | Norman Tokar | Co-Producer |
| Crew | Eustace Lycett | Special Effects |
| Costume & Make-Up | Lola Kemp | Hairstylist |
| Sound | Evelyn Kennedy | Music Editor |
| Art | Norman Rockett | Set Decoration |
| Sound | Bud Maffett | Sound Mixer |
| Costume & Make-Up | Robert J. Schiffer | Makeup Artist |
| Directing | Gene Sultan | Assistant Director |
| Sound | Herb Taylor | Sound Supervisor |
| Art | Eric A. Hulett | Set Dresser |
| Visual Effects | Harrison Ellenshaw | Matte Painter |
| Crew | Don Spinney | Animal Coordinator |
| Production | Jan Williams | Associate Producer |
| Sound | Ben Hendricks | Sound Editor |
| Crew | Dick Warlock | Stunt Coordinator |
| Crew | Art Cruickshank | Special Effects |
| Costume & Make-Up | Chuck Keehne | Costume Design |
| Directing | Arthur J. Vitarelli | Second Unit Director |
| Sound | George Fredrick | Sound Editor |
| Crew | Danny Lee | Special Effects |
| Crew | Rudy Cowl | Animal Coordinator |
| Sound | Jack Hayes | Orchestrator |
| Sound | ლალო შიფრინი | Original Music Composer |
| Camera | Charles F. Wheeler | Director of Photography |
| Production | Christopher N. Seiter | Unit Production Manager |
| Crew | Walter Robles | Stunts |
| Crew | Julie Ann Johnson | Stunts |
| Crew | Jack Verbois | Stunts |
| Camera | Rexford L. Metz | Second Unit Director of Photography |
| Crew | Bob Harris | Stunts |
| Crew | Fred Dale | Stunts |
| Crew | Tom Steele | Stunts |
| Crew | Regis Parton | Stunts |
| Crew | Jerry Brutsche | Stunts |
| Crew | Carey Loftin | Stunts |
| Crew | Ross Reynolds | Pilot |
