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Martin Milner as Karl Robinson |
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Pat Delaney as Lottie Robinson |
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Michael-James Wixted as Fred Robinson |
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Eric Olson as Ernie Robinson |
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Cindy Fisher as Helga Wagner |
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Cameron Mitchell as Jeremiah Worth |
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John Vernon as Charles Forsythe |
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George DiCenzo as Suramin |
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John Crawford as Nate Bidwell |
| Directing | Harry Harris | Director |
| Production | Irwin Allen | Producer |
| Camera | Fred Jackman Jr. | Director of Photography |
| Writing | Ken Trevey | Teleplay |
| Writing | Johann David Wyss | Novel |
| Production | Al Gail | Associate Producer |
| Production | William Welch | Associate Producer |
| Sound | Richard LaSalle | Music |
| Editing | Bill Brame | Editor |
| Editing | William DeNicholas | Editor |
| Production | Jack Baur | Casting |
| Art | Stan Jolley | Production Design |
| Art | Sam Jones | Set Decoration |
| Costume & Make-Up | Paul Zastupnevich | Costume Design |
| Crew | Hubie Kerns Jr. | Stunts |
| Crew | Bobby Porter | Stunt Double |
| Sound | Lionel Newman | Music Supervisor |
| Sound | Donald F. Johnson | Sound Mixer |
| Sound | Andy Malcolm | Foley Artist |
| Directing | Robert Saunders | Assistant Director |
