An accident occurs in an ultra-secret government biological weapons laboratory spreading a sinister bacteria.
Unfortunately the movie Warning Sign is not yet available on HBO Max.
| Writing | Hal Barwood | Writer |
| Writing | Matthew Robbins | Writer |
| Directing | Hal Barwood | Director |
| Editing | Robert Lawrence | Editor |
| Production | Susan Arnold | Casting |
| Sound | Craig Safan | Original Music Composer |
| Camera | Dean Cundey | Director of Photography |
| Art | Henry Bumstead | Production Design |
| Art | Mickey S. Michaels | Set Decoration |
| Costume & Make-Up | Aggie Guerard Rodgers | Costume Design |
| Crew | Chuck Picerni Jr. | Stunts |
| Crew | Gary McLarty | Stunts |
| Costume & Make-Up | Edouard F. Henriques | Makeup Supervisor |
| Costume & Make-Up | Yolanda Toussieng | Hairstylist |
| Directing | Nick Marck | First Assistant Director |
| Directing | Hope R. Goodwin | Second Assistant Director |
| Visual Effects | Gregory L. McMurry | Visual Effects Supervisor |
| Crew | Kevin Pike | Special Effects |
| Crew | Pete Antico | Stunts |
| Crew | Jophery C. Brown | Stunts |
| Crew | Bobby Bass | Stunt Coordinator |
| Crew | David Burton | Stunts |
| Crew | Laurie Creach | Stunts |
| Crew | Eddy Donno | Stunts |
| Crew | Debbi A. Davison | Stunts |
| Crew | Gary Epper | Stunts |
| Crew | James M. Halty | Stunts |
| Crew | Kenny Endoso | Stunts |
| Crew | David Perna | Stunts |
| Crew | Michael Runyard | Stunts |
| Crew | Billy Hank Hooker | Stunts |
| Crew | Pete Turner | Stunts |
| Crew | Scott Wilder | Stunts |
| Crew | Walter Wyatt | Stunts |
| Crew | Cha Cha Sandoval-McMahon | Stunts |
| Production | Hal Barwood | Producer |
| Production | Jim Bloom | Producer |
| Production | Matthew Robbins | Executive Producer |
| Production | Robert Latham Brown | Associate Producer |
| Costume & Make-Up | David Quashnick | Makeup Artist |
