A break-in and sabotage attempt occurs at a top secret research institute and the culprit is cornered and captured. The problem is that he's been badly injured and claims to have lost his memory entirely. A cat-and-mouse game ensues between investigator Tuxan, the mystery intruder Welles and the people who sent him on the mission.
Unfortunately the movie The Groundstar Conspiracy is not yet available on HBO Max.
| Writing | Leslie P. Davies | Novel |
| Writing | Douglas Heyes | Screenplay |
| Production | Hal Roach, Jr. | Producer |
| Production | Trevor Wallace | Producer |
| Sound | Paul Hoffert | Original Music Composer |
| Editing | Edward M. Abroms | Editor |
| Directing | Lamont Johnson | Director |
| Camera | Michael Reed | Director of Photography |
| Camera | Ron Drinkwater | Focus Puller |
| Production | Earl A. Glick | Executive Producer |
| Production | Frank Arrigo | Associate Producer |
| Art | Cam Porteous | Set Designer |
| Directing | Roger Good | Assistant Director |
| Production | Harvie McCracken | Unit Production Manager |
| Editing | Bill Lewthwaite | Associate Editor |
| Editing | Roy Piper | Associate Editor |
| Editing | Frederic L. Knudtson | Associate Editor |
| Directing | Margaret Hanly | Script Supervisor |
| Costume & Make-Up | Phyllis Newman | Makeup Artist |
| Costume & Make-Up | Ilse Richter | Wardrobe Supervisor |
| Crew | Herbert Ewing | Special Effects |
| Sound | John W. Gusselle | Sound Mixer |
| Crew | Bob Herron | Stunts |
| Crew | David Ostere | Stunt Coordinator |
| Costume & Make-Up | Werner Keppler | Makeup Artist |
