De eenzame weduwe Helen Mercer (Amanda Blake) neemt een jonge vrouw in dienst als gezelschapsdame. Helen is er zich echter niet bewust van dat de vrouw en haar vriend leven van moord en afpersing. De twee vatten het plan op de weduwe tot hun volgende slachtoffer te maken...
Nee, helaas is Betrayal nog niet beschikbaar op Netflix in Nederland.
| Directing | Gordon Hessler | Director |
| Writing | Doris Miles Disney | Novel |
| Writing | James M. Miller | Teleplay |
| Production | Gerald W. Abrams | Associate Producer |
| Production | Charles W. Fries | Executive Producer |
| Production | Gerald I. Isenberg | Producer |
| Sound | Ernest Gold | Original Music Composer |
| Camera | Jacques R. Marquette | Director of Photography |
| Editing | John A. Martinelli | Editor |
| Production | Eddie Foy III | Casting |
| Art | Solomon Brewer | Set Decoration |
| Costume & Make-Up | Fred B. Phillips | Makeup Artist |
| Costume & Make-Up | Gertrude Wheeler | Hairstylist |
| Production | Joe Wonder | Production Manager |
| Directing | Maury Dexter | Assistant Director |
| Art | Sam Bergman | Property Master |
| Sound | Charles T. Knight | Sound Mixer |
| Sound | Robert J. Litt | Recording Supervision |
| Camera | Robert Blair | Key Grip |
| Lighting | Robert A. Petzoldt | Gaffer |
| Costume & Make-Up | Marie Brown | Costumer |
| Editing | Scott C. Eyler | Assistant Editor |
| Editing | Robert Papazian | Supervising Editor |
| Production | Jerry Wineman | Location Manager |
| Sound | John Mick | Music Editor |
| Directing | Mary Yerke | Script Supervisor |
| Production | Elliot Friedgen | Production Executive |
