Scientists surgically transform the Creature into an air-breather, but being able to live on land is not enough to make him comfortable with humans. Enraged, he turns his wrath on anyone who comes near as he desperately tries to return to the deep-water world where he truly belongs.
| Directing | John Sherwood | Director |
| Production | William Alland | Producer |
| Writing | Arthur A. Ross | Screenplay |
| Writing | Arthur A. Ross | Story |
| Sound | Irving Gertz | Original Music Composer |
| Sound | Henry Mancini | Original Music Composer |
| Sound | Heinz Roemheld | Original Music Composer |
| Camera | Maury Gertsman | Director of Photography |
| Editing | Edward Curtiss | Editor |
| Art | Alexander Golitzen | Art Direction |
| Art | Robert Emmet Smith | Art Direction |
| Art | John P. Austin | Set Decoration |
| Art | Russell A. Gausman | Set Decoration |
| Costume & Make-Up | Joan St. Oegger | Hairstylist |
| Costume & Make-Up | Vincent Romaine | Makeup Artist |
| Camera | Eddie Pyle | Camera Operator |
| Camera | Lew Schwartz | Assistant Camera |
| Lighting | Max Nippell | Gaffer |
| Art | Julius Rosenkrantz | Props |
| Sound | Leslie I. Carey | Sound |
| Sound | Robert Pritchard | Sound |
| Sound | Peter Berkos | Sound Editor |
| Sound | Robert L. Bratton | Sound Editor |
| Sound | George Hoagland | Sound Editor |
| Visual Effects | Clifford Stine | Visual Effects Camera |
| Costume & Make-Up | Jay A. Morley Jr. | Costume Design |
| Costume & Make-Up | Roger J. Weinberg | Costume Design |
| Costume & Make-Up | Jack Kevan | Makeup Effects Designer |
| Visual Effects | Clifford Stine | Visual Effects |
| Costume & Make-Up | Bud Westmore | Makeup Supervisor |
