Directed by
| Robert Clarke | ||
| Tom Boutross | ... | (co-director) |
Writing Credits
| E.S. Seeley Jr. | ... | (screenplay) |
| Doane R. Hoag | ... | (additional dialogue) (as Doane Hoag) |
| Robert Clarke | ... | (based on an original idea by) & |
| Phil Hiner | ... | (based on an original idea by) |
Cast (in credits order) complete, awaiting verification
| Robert Clarke | ... | Dr. Gilbert McKenna | |
 |
Patricia Manning | ... | Ann Russell |
| Nan Peterson | ... | Trudy Osborne | |
| Patrick Whyte | ... | Dr. Frederick Buckell | |
|
|
Fred La Porta | ... | Dr. Jacob Hoffman |
|
|
Peter Similuk | ... | George Messorio |
|
|
William White | ... | Police Lt. Peterson (as Bill Hampton) |
|
|
Robert Garry | ... | Dr. Stern |
| Donna King | ... | Suzy's Mother | |
|
|
Xandra Conkling | ... | Suzy |
|
|
Del Courtney | ... | Radio Deejay |
|
|
Richard Cassarino | ... | Barfly / Man on Beach with Kids / Policeman (as Cass Richards) |
|
|
Helen Joseph | ||
|
|
Darryl Westbrook | ||
|
|
Bill Currie | ||
|
|
Pearl Driggs | ... | Convalescing Woman on Roof |
|
|
Fran Leighton | ||
|
|
Bob Hafner | ||
|
|
John Murphy | ||
|
|
Anthony J. Hilder | ... | (as Tony Hilder) |
|
|
Chuck Newell | ||
|
|
David Sloan | ... | Newsboy |
| Rest of cast listed alphabetically: | |||
|
|
Ron Honthaner | ... | Policeman in Warehouse (uncredited) |
|
|
Robin C. Kirkman | ... | Policeman (uncredited) |
|
|
Douglas Menville | ... | Policeman (uncredited) |
Produced by
| Robert Clarke | ... | producer |
| Robin C. Kirkman | ... | associate producer |
Cinematography by
| Stan Follis | ... | (photography) |
| Vilis Lapenieks | ... | (photography) |
| John Arthur Morrill | ... | (as John Morrill) (photography) |
Editing by
| Tom Boutross | ||
Art Direction by
| Richard Cassarino | ... | (as Gianbattista Cassarino) |
Makeup Department
| Richard Cassarino | ... | makeup artist (as Ben Sarino) |
Production Management
| Robin C. Kirkman | ... | production manager |
Second Unit Director or Assistant Director
| Tom Miller | ... | assistant director |
Sound Department
| Douglas Menville | ... | sound |
Costume and Wardrobe Department
| Richard Cassarino | ... | monster costume (uncredited) |
Editorial Department
| Ron Honthaner | ... | assistant editor |
Music Department
| John Seely | ... | music editor |
| Philip Green | ... | composer: stock music (uncredited) |
| Alexander Laszlo | ... | composer: stock music (uncredited) |
| William Loose | ... | composer: stock music (uncredited) |
Additional Crew
| Richard Cassarino | ... | assistant to producers (as Gianbattista Cassarino) |
| Deanie Follis | ... | script continuity |
