 | Glenn Corbett als Karl Anderson |
 | Patricia Breslin als Miriam Webster |
 | Eugenie Leontovich als Helga Swenson |
 | Alan Bunce als Dr. Jonas |
 | Richard Rust als Jim Nesbitt |
 | James Westerfield als Alfred S. Adrims |
 | Gilbert Green als Lt. Miller |
 | Joan Marshall als Emily |
 | Hope Summers als Martha Adrims (Uncredited) |
 | Harry 'Snub' Pollard als Eddie, Bellhop (Uncredited) |
 | Wolfe Barzell als Olie (Uncredited) |
 | Teri Foster Brooks als Mrs. Forest (Uncredited) |
 | William Castle als Self, Prologue Host (Uncredited) |
 | Ralph Moody als First Hotel Clerk (Uncredited) |
 | Joseph Forte als Second Hotel Clerk (Uncredited) |
| Hugo Friedhofer | Original Music Composer |
| William Castle | Director |
| William Castle | Producer |
| Edwin H. Bryant | Editor |
| Robb White | Writer |
| Dona Holloway | Associate Producer |
| Burnett Guffey | Director of Photography |
| Cary Odell | Art Direction |
| Darrell Silvera | Set Decoration |
| Ben Lane | Makeup Artist |
| Al Shenberg | Assistant Director |
| Charles J. Rice | Sound Supervisor |
| Lambert E. Day | Sound |
| Arnold L. Rich | Assistant Camera |
| Hugo Friedhofer | Conductor |
| Wayne Fitzgerald | Title Designer |
