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Alan Alda as Myles Clarkson |
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Jacqueline Bisset as Paula Clarkson |
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Barbara Parkins as Roxanne Delancey |
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Bradford Dillman as Bill Delancey |
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William Windom as Dr. Roger West |
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Curd Jürgens as Duncan Mowbray |
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Kathleen Widdoes as Maggie West |
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Pamelyn Ferdin as Abby Clarkson |
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Curt Lowens as |
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Gregory Morton as Conductor |
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Janee Michelle as Agency Chief's Girlfriend |
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Lilyan Chauvin as Woman Writer |
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Khigh Dhiegh as Zanc Theun |
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Alberto Morin as Bennett |
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Berry Kroeger as Raymont |
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Antoinette Bower as Member of Ely's Group (uncredited) |
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Walter Brooke as Party Guest (uncredited) |
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Marta Kristen as Party Guest (uncredited) |
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Frank Campanella as Detective (uncredited) |
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Cosmo Sardo as Party Guest (uncredited) |
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Harry Carter as Pallbearer (uncredited) |
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Terrence Scammell as Richard |
| Directing | Paul Wendkos | Director |
| Writing | Ben Maddow | Writer |
| Sound | Jakob Gimpel | Musician |
| Writing | Fred Mustard Stewart | Novel |
| Production | Arthur Fellows | Associate Producer |
| Production | Quinn Martin | Producer |
| Camera | William W. Spencer | Director of Photography |
| Editing | Richard K. Brockway | Editor |
| Sound | Jerry Goldsmith | Original Music Composer |
| Costume & Make-Up | Moss Mabry | Costume Design |
| Art | Richard Y. Haman | Art Direction |
| Art | Walter M. Scott | Set Decoration |
| Art | Raphael Bretton | Set Decoration |
| Art | Sidney H. Greenwood | Property Master |
| Art | Phill Norman | Title Designer |
| Production | William Eckhardt | Unit Production Manager |
| Directing | David Hall | Assistant Director |
| Sound | Arthur Morton | Orchestrator |
| Camera | Gene Evans | Camera Operator |
| Sound | John A. Bonner | Sound Supervisor |
| Sound | Don J. Bassman | Sound Re-Recording Mixer |
| Sound | Don J. Bassman | Sound Mixer |
| Costume & Make-Up | Daniel C. Striepeke | Makeup Supervisor |
| Costume & Make-Up | Joe DiBella | Makeup Artist |
| Costume & Make-Up | Pat Abbott | Hairstylist |
| Crew | Charlie Picerni | Stunts |
| Camera | George Hurrell Sr. | Still Photographer |
