A former associate of Perry Mason returns to handle the defense of a world-class chess player accused of murdering a prominent TV personality.
Unfortunately the movie Perry Mason: The Case of the Lethal Lifestyle is not yet available on Paramount Plus.
| Directing | Helaine Head | Director |
| Writing | Erle Stanley Gardner | Novel |
| Sound | Fred Steiner | Main Title Theme Composer |
| Costume & Make-Up | Kelly Andrew King | Costume Supervisor |
| Production | Albert J. Salzer | Unit Production Manager |
| Crew | Gary Jensen | Stunt Coordinator |
| Sound | Bill Nicholson | Sound Re-Recording Mixer |
| Sound | Andy MacDonald | Sound Re-Recording Mixer |
| Editing | Leon Ortiz-Gil | Editor |
| Production | Eric Dawson | Casting |
| Art | Anthony C. Thorpe | Property Master |
| Sound | Tom Meloeny | Sound Re-Recording Mixer |
| Directing | Brad Michaelson | Second Second Assistant Director |
| Camera | Tom May | Key Grip |
| Costume & Make-Up | Diane Shatz | Makeup Artist |
| Production | Donna Colabella | Production Executive |
| Production | Paul Mason | Executive In Charge Of Production |
| Writing | Bruce Franklin Singer | Teleplay |
| Art | Wayne Fitzgerald | Main Title Designer |
| Sound | Jory A. Beckert | Supervising Sound Editor |
| Production | Joel Steiger | Co-Executive Producer |
| Production | Carol Kritzer | Casting Associate |
| Lighting | Mel Kekuewa | Gaffer |
| Costume & Make-Up | Clare M. Corsick | Hairstylist |
| Directing | Petra Jorgensen | Script Supervisor |
| Production | Andrea Nachman | Production Coordinator |
| Editing | Ann Hagerman | Assistant Editor |
| Directing | Bob King | Second Assistant Director |
| Camera | Lee Nakahara | Camera Operator |
| Costume & Make-Up | Dionne Smith | Makeup Artist |
| Production | Angela Spieles | Post Production Coordinator |
| Writing | Bruce Franklin Singer | Story |
| Production | Fred Silverman | Executive Producer |
| Costume & Make-Up | Jyl Moder | Costumer |
| Camera | Frank Thackery | Director of Photography |
| Directing | Dwight Williams | First Assistant Director |
| Production | Pamela Knapp | Production Accountant |
| Crew | Dave West | Transportation Coordinator |
| Sound | Ted Roberts | Music Editor |
| Production | Dale Allen Pelton | Production Designer |
| Art | Robert R. Benton | Set Decoration |
| Costume & Make-Up | Brenda Blatt | Hairstylist |
| Production | Geoffrey R. Smith | Location Manager |
| Art | Edward Fowles | Construction Coordinator |
| Production | Robert Benevides | Production Consultant |
| Writing | Joyce Burditt | Teleplay |
| Production | Robert J. Ulrich | Casting |
| Sound | Robert Abbott | Production Sound Mixer |
| Crew | Dennis Smith | Legal Services |
| Production | Hal Harrison | Executive In Charge Of Post Production |
| Sound | Dick DeBenedictis | Music |
| Production | Barry Steinberg | Producer |
| Production | Joyce Burditt | Supervising Producer |
| Production | Dean Hargrove | Executive Producer |
