The alleged suicide of a gubernatorial candidate triggers a series of mysterious deaths leading to the governor's mansion, and "Wild" Bill McKenzie, a friend of Perry Mason, is on the case.
Unfortunately the movie Perry Mason: The Case of the Grimacing Governor is not yet available on HBO Max.
| Directing | Max Tash | Director |
| Writing | Erle Stanley Gardner | Novel |
| Writing | Robert Schlitt | Writer |
| Sound | Dick DeBenedictis | Music |
| Sound | Fred Steiner | Main Title Theme Composer |
| Editing | David Solomon | Editor |
| Production | Paul Staheli | Production Designer |
| Camera | Frank Thackery | Director of Photography |
| Production | Barry Steinberg | Producer |
| Production | Joyce Burditt | Supervising Producer |
| Production | Joel Steiger | Co-Executive Producer |
| Production | Dean Hargrove | Executive Producer |
| Production | Fred Silverman | Executive Producer |
| Production | Robin Madden | Associate Producer |
| Production | Robert J. Ulrich | Casting |
| Production | Eric Dawson | Casting |
| Production | Carol Kritzer | Casting |
| Production | Billy Ray Smith | Unit Production Manager |
| Directing | Phil Cook | First Assistant Director |
| Directing | Peter C. Graupner | Second Assistant Director |
| Art | Bob Intlekofer | Set Decoration |
| Camera | Lee Nakahara | Camera Operator |
| Lighting | Victor Abbene | Gaffer |
| Camera | Jeff Smith | Key Grip |
| Sound | Robert Abbott | Production Sound Mixer |
| Costume & Make-Up | Dodie Shepard | Costume Supervisor |
| Costume & Make-Up | Charles DeMuth | Costumer |
| Costume & Make-Up | Christine Heinz | Costumer |
| Art | Frank Escobedo | Property Master |
| Costume & Make-Up | Diane Shatz | Makeup Artist |
| Costume & Make-Up | Dionne Smith | Makeup Artist |
| Costume & Make-Up | Clare M. Corsick | Hairstylist |
| Costume & Make-Up | Brenda Blatt | Hairstylist |
| Crew | Gary Jensen | Stunt Coordinator |
| Directing | Joanna Yearsley | Script Supervisor |
| Production | Derry J. Pearce | Production Accountant |
| Production | Kami Turrou | Production Coordinator |
| Production | Geoffrey R. Smith | Location Manager |
| Crew | James 'Obee' Oberman | Transportation Coordinator |
| Art | Van C. Unger | Construction Coordinator |
| Directing | Richard J. Hinds | Second Second Assistant Director |
| Production | Donna Colabella | Production Executive |
| Production | Robert Benevides | Production Consultant |
| Production | Robert McGee | Casting Assistant |
| Crew | Dennis Smith | Legal Services |
| Production | Hal Harrison | Executive In Charge Of Post Production |
| Editing | Daisy Kettner | Assistant Editor |
| Production | Angela Spieles | Post Production Coordinator |
| Art | Wayne Fitzgerald | Main Title Designer |
| Sound | Richard LeGrand Jr. | Supervising Sound Editor |
| Sound | Bill Nicholson | Sound Re-Recording Mixer |
| Sound | Andy MacDonald | Sound Re-Recording Mixer |
| Sound | Tom Meloeny | Sound Re-Recording Mixer |
| Sound | Ted Roberts | Music Editor |
| Production | Paul Mason | Executive In Charge Of Production |
