American computer whiz Luke Williams meets elderly Lavinia Fullerton on a London-bound train. She reveals she's discovered the identity of a serial killer in her village and is going to report it to Scotland Yard. When she is murdered after disembarking the train, Williams vows to pursue the case himself.
Unfortunately the movie Murder Is Easy is not yet available on HBO Max.
| Writing | Agatha Christie | Novel |
| Directing | Claude Whatham | Director |
| Writing | Carmen Culver | Teleplay |
| Production | Stan Margulies | Producer |
| Production | David L. Wolper | Executive Producer |
| Sound | Gerald Fried | Music |
| Camera | Brian Tufano | Director of Photography |
| Editing | David Newhouse | Editor |
| Art | Ian Whittaker | Art Direction |
| Art | Ann Mollo | Set Decoration |
| Costume & Make-Up | Joan Carpenter | Hairstylist |
| Costume & Make-Up | Barry Richardson | Hairstylist |
| Costume & Make-Up | Ernest Gasser | Makeup Artist |
| Costume & Make-Up | Eddie Knight | Makeup Artist |
