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Ben Gazzara as Steven Graves |
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E.G. Marshall as James Wright |
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Martin Sheen as Timothy Drew |
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William Windom as Robert Phillips |
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Joseph Wiseman as Dr. Nordman |
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Jim McMullan as Lewis |
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Will Kuluva as Dr. Wolff |
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Hank Brandt as Agent |
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Quinn K. Redeker as Captain Morrison |
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Conrad Bachmann as Second Officer |
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Robert Cleaves as Gleason |
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Walt Davis as First Officer |
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Dan Ferrone as Salesman |
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Sid Grossfeld as Stack |
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Diki Lerner as Nerve Gas Victim |
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Len Wayland as Karley |
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Joe Brooks as Cop |
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Eddie Garrett as |
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Bob Harks as |
| Directing | Michael Crichton | Director |
| Production | Robert L. Jacks | Producer |
| Production | Lee Rich | Producer |
| Sound | Jerry Goldsmith | Original Music Composer |
| Editing | Gene Fowler Jr. | Editor |
| Production | Hoyt Bowers | Casting |
| Art | Robert Emmet Smith | Production Design |
| Crew | Dick Ziker | Stunt Coordinator |
| Writing | Michael Crichton | Novel |
| Writing | Robert Dozier | Screenplay |
| Camera | Robert L. Morrison | Director of Photography |
| Art | James Cane | Set Decoration |
| Costume & Make-Up | Jerry Cash | Makeup Artist |
| Crew | Logan Frazee | Special Effects |
| Art | Robert M. Anderson | Property Master |
