| Cast list | | Robert Vaughn | as | Dr. Arno Franken | | Robert Perault | as | John Doe - Room 841 | | David Selby | as | Dr. Mike Foster | | Teri Garr | as | Kelli Fisher | | Josef Sommer | as | Mr. Parker | | Cynthia Harris | as | Anita Franken | | Addison Powell | as | Dr. Eric Kerwin | | Takayo Doran | as | Claire | | Claiborne Cary | as | Jenny | | Nicolas Surovy | as | Martin Elson | | Rudolph Willrich | as | Arthur Gurnsey | | Sam Schacht | as | Lieutenant Pearson | | Conchetta Tolman | as | Reporter | | Ted Sorel | as | Gerald Blake (as Theodore Sorel) | | Sylvia Lowe | as | Mrs. Parker |
| | Crew list: | | Marvin J. Chomsky (Director) | | Jeff Lieberman (Director) | | Jeff Lieberman (Writer) | | Mary Shelley (Writer) |
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