After robbing and murdering his married lover and then making her death look like suicide, conniving philanderer Ronnie Mason relocates to Los Angeles. Under a new identity and claiming to be a writer, Ronnie finds lodging at the home of Hilda Fenchurch and her mother. He woos Hilda, knowing she has money, but when he discovers that Hilda's sister, Anne, has just inherited $25,000, he switches his attentions to her.
Unfortunately the movie Danger Signal is not yet available on HBO Max.
| Directing | Robert Florey | Director |
| Production | William Jacobs | Producer |
| Production | Jack L. Warner | Executive Producer |
| Sound | Adolph Deutsch | Original Music Composer |
| Camera | James Wong Howe | Director of Photography |
| Editing | Frank Magee | Editor |
| Art | Stanley Fleischer | Art Direction |
| Art | Jack McConaghy | Set Decoration |
| Costume & Make-Up | Milo Anderson | Costume Design |
| Costume & Make-Up | Perc Westmore | Makeup Artist |
| Directing | Elmer Decker | Assistant Director |
| Crew | Harry Barndollar | Special Effects |
| Crew | Edwin B. DuPar | Special Effects |
| Art | Bertram Tuttle | Supervising Art Director |
| Writing | Adele Comandini | Screenplay |
| Writing | C. Graham Baker | Screenplay |
| Writing | Phyllis Bottome | Novel |
| Sound | Everett Alton Brown | Sound |
| Sound | Gerald W. Alexander | Sound Re-Recording Mixer |
| Sound | Robert G. Wayne | Sound Re-Recording Mixer |
| Camera | Vernon Larson | Additional Camera |
| Crew | James Leicester | Editorial Staff |
| Sound | Murray Cutter | Orchestrator |
| Sound | Leo F. Forbstein | Music Director |
| Sound | Charles David Forrest | Music |
