| Cast list | | Paul Michael Glaser | as | Harry Houdini (Erich Weiss) | | Sally Struthers | as | Bess Houdini | | Ruth Gordon | as | Cecilia Weiss | | Vivian Vance | as | Minnie (nurse) | | Adrienne Barbeau | as | Daisy White | | Bill Bixby | as | Rev. Arthur Ford | | Jack Carter | as | Theo Weiss | | Peter Cushing | as | Sir Arthur Conan Doyle | | Nina Foch | as | Rev. Le Veyne | | Wilfrid Hyde-White | as | Supt. Melville | | Geoffrey Lewis | as | Dr. Crandon | | Maureen O'Sullivan | as | Lady Conan Doyle | | Clive Revill | as | Dundas Slater | | Barbara Rhoades | as | Margery Crandon | | Jerome Thor | as | Conductor |
| | Crew list: | | Melville Shavelson (Director) | | Peter Benchley (Writer) | | Melville Shavelson (Writer) |
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