All New Thrills! Shocks! Suspense!
5.592
82 min
In a tributary of the Amazon, a monster – half-man, half-fish – is captured and placed in a reservoir in a Florida national park to be observed by scientists.
| Name | Character | Team | |
|---|---|---|---|
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John Agar | Prof. Clete Ferguson | Unowned |
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Lori Nelson | Helen Dobson | Unowned |
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John Bromfield | Joe Hayes | Unowned |
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Nestor Paiva | Captain Lucas | Unowned |
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Grandon Rhodes | Jackson Foster | Unowned |
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Dave Willock | Lou Gibson | Unowned |
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Robert B. Williams | George Johnson | Unowned |
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Charles Cane | Police Captain | Unowned |
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Loretta Agar | Woman on Boat (uncredited) | Unowned |
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Bill Baldwin | Patrol Boat Dispatcher (voice / uncredited) | Unowned |
| Jere Beery | Photographer (uncredited) | Unowned | |
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Ricou Browning | The Gill Man (in water) / Lab Technician (uncredited) | Unowned |
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Diane DeLaire | Miss Abbott (uncredited) | Unowned |
| Mike Doyle | Cop (uncredited) | Unowned | |
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Clint Eastwood | Jennings (uncredited) | Calvin and Nobbs |
| Jack Gargan | Skipper (uncredited) | Unowned | |
| Charles Gibb | Cop (uncredited) | Unowned | |
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Brett Halsey | Pete (uncredited) | Unowned |
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Don C. Harvey | Mac - Spotlight Party Leader (uncredited) | Unowned |
| Tom Hennesy | The Gill Man (on land) / Marineland Diver (uncredited) | Unowned | |
| Don House | Diver (uncredited) | Unowned | |
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Robert F. Hoy | Charlie (uncredited) | Unowned |
| Ned Le Fevre | Newscaster (uncredited) | Unowned | |
| Sydney Mason | Police Announcer (uncredited) | Unowned | |
| Robert Nelson | Dr. McCuller (uncredited) | Unowned | |
| Patricia Powers | Girl in Convertible | Unowned | |
| Bert Stevens | Search Party Member (uncredited) | Unowned | |
| Charles Victor | Policeman (uncredited) | Unowned | |
| Robert Wehling | Joe (uncredited) | Unowned | |
| James R. Wolfe | Man at Tank (uncredited) | Unowned |