Ruth Earlton has come home to her ancestral mansion to claim her inheritance. Accompanied by her boyfriend, she discovers that her father died suddenly under suspicious circumstances. Now it's her turn, as her deranged and relentless uncle targets her for death with the help of his wife and son, plus a very unhappy ape.
Unfortunately the movie The Monster Walks is not yet available on HBO Max.
| Directing | Frank R. Strayer | Director |
| Sound | George F. Hutchins | Sound Recordist |
| Sound | Charles Dunworth | Original Music Composer |
| Directing | Wilfred Black | Assistant Director |
| Writing | Robert Ellis | Story |
| Writing | Robert Ellis | Adaptation |
| Camera | Jules Cronjager | Director of Photography |
| Art | Ben Doré | Art Direction |
| Editing | Byron Robinson | Editor |
| Art | Ralph E. Black | Set Decoration |
| Production | Cliff P. Broughton | Production Supervisor |
| Production | Cliff P. Broughton | Producer |
| Production | Ralph M. Like | Executive Producer |
