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 | James M. Miller | Teleplay |
| Writing | Doris Miles Disney | Novel |
| Production | Eddie Foy III | Casting |
| Production | Charles W. Fries | Executive Producer |
| Sound | Charles T. Knight | Sound Mixer |
| Sound | John Mick | Music Editor |
| Production | Gerald I. Isenberg | Producer |
| Costume & Make-Up | Fred B. Phillips | Makeup Artist |
| Lighting | Robert A. Petzoldt | Gaffer |
| Costume & Make-Up | Marie Brown | Costumer |
| Editing | Robert Papazian | Supervising Editor |
| Sound | Robert J. Litt | Recording Supervision |
| Production | Jerry Wineman | Location Manager |
| Art | Solomon Brewer | Set Decoration |
| Editing | Scott C. Eyler | Assistant Editor |
| Editing | John A. Martinelli | Editor |
| Camera | Robert Blair | Key Grip |
| Production | Elliot Friedgen | Production Executive |
| Camera | Jacques R. Marquette | Director of Photography |
| Costume & Make-Up | Gertrude Wheeler | Hairstylist |
| Art | Sam Bergman | Property Master |
| Sound | Ernest Gold | Original Music Composer |
| Production | Joe Wonder | Production Manager |
| Directing | Mary Yerke | Script Supervisor |
| Production | Gerald W. Abrams | Associate Producer |
| Directing | Maury Dexter | Assistant Director |
