Directed by
| Nick Grinde | ... | (as Nick Grindé) |
Writing Credits
| Karl Brown | ... | (screen play) |
| Harold Shumate | ... | (story) |
Cast (in credits order) complete, awaiting verification
| Boris Karloff | ... | Dr. Leon Kravaal | |
| Roger Pryor | ... | Dr. Tim Mason | |
| Jo Ann Sayers | ... | Judith Blair | |
| Stanley Brown | ... | Bob Adams | |
| John Dilson | ... | John Hawthorne | |
| Hal Taliaferro | ... | Sheriff Stanton | |
| Byron Foulger | ... | Dr. Bassett | |
| Charles Trowbridge | ... | Dr. Harvey | |
| Ernie Adams | ... | Pete Daggett | |
| Rest of cast listed alphabetically: | |||
| Bruce Bennett | ... | State Trooper (uncredited) | |
 |
James Conaty | ... | Doctor Spectator (uncredited) |
| Eddie Dew | ... | Doctor Spectator Listening to Explanation (uncredited) | |
| Minta Durfee | ... | Frozen Therapy Patient (uncredited) | |
| Charles Halton | ... | Doctor in Front Row in Final Scene (uncredited) | |
| William Marion | ... | Doctor Spectator (uncredited) | |
|
|
Charles Miller | ... | Doctor Spectator Explaining Procedure (uncredited) |
| Ivan Miller | ... | Sheriff Haley (uncredited) | |
| Wedgwood Nowell | ... | Doctor Spectator (uncredited) | |
| Cyril Ring | ... | Doctor Spectator (uncredited) | |
| Landers Stevens | ... | Doctor Spectator (uncredited) | |
| Lee Willard | ... | Frozen Body of Jasper Adams (uncredited) | |
Produced by
| Irving Briskin | ... | executive producer (uncredited) |
| Wallace MacDonald | ... | producer (uncredited) |
Cinematography by
| Benjamin H. Kline | ... | director of photography (as Benjamin Kline) |
Editing by
| Al Clark | ||
Art Direction by
| Lionel Banks | ||
Makeup Department
| Fred B. Phillips | ... | makeup artist (uncredited) |
Second Unit Director or Assistant Director
| Arthur S. Black Jr. | ... | assistant director (uncredited) |
Sound Department
| Edward Bernds | ... | sound engineer (uncredited) |
Costume and Wardrobe Department
| Eugene Joseff | ... | costume jeweller (uncredited) |
Music Department
| Mischa Bakaleinikoff | ... | composer: stock music (uncredited) |
| Gerard Carbonara | ... | composer: stock music (uncredited) |
| Ben Oakland | ... | composer: stock music (uncredited) |
| Karol Rathaus | ... | composer: stock music (uncredited) |
| Morris Stoloff | ... | musical director (uncredited) |
| Gregory Stone | ... | composer: stock music (uncredited) |
Additional Crew
| Ralph S. Willard | ... | technical advisor (as Dr. Ralph S. Willard) |
