Dr Sloan suspects that his flame of long ago, famous heart surgeon Dr Rachel Walters, has murdered US Senator Cabot on the occasion of a guest operation at the community hospital. After a long investigation, Sloan and fellow detectives Dr Bentley and Dr Parker discover her motive: Years ago, Cabot had caused a hit-and-run accident that put her daughter into coma. But how did Dr Walters manage to pass the deadly bacteria on to the senator in front of TV cameras?
Unfortunately the movie Diagnosis Murder: A Twist of the Knife is not yet available on HBO Max.
| Directing | Jerry London | Director |
| Writing | William Read Woodfield | Writer |
| Writing | Gerry Conway | Writer |
| Costume & Make-Up | Mary L. Mastro | Hair Designer |
| Costume & Make-Up | Judith Scheurwater | Costume Design |
| Costume & Make-Up | Patti Dallas | Makeup Artist |
| Art | Paul Staheli | Production Design |
| Production | Barry Steinberg | Producer |
| Production | Dean Hargrove | Producer |
| Production | Joyce Burditt | Supervising Producer |
| Production | Maureen A. Arata | Casting |
| Production | Fred Silverman | Producer |
| Sound | Dick DeBenedictis | Music |
| Crew | Robert Seaman | Cinematography |
| Production | Barry Steinberg | Unit Production Manager |
| Art | Laurie Holsgrove | Set Decoration |
| Costume & Make-Up | Stacy Halax | Makeup Artist |
| Production | Paul Mason | Executive In Charge Of Production |
