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.
| Editing | Edward M. Abroms | Editor |
| Sound | Paul Hoffert | Original Music Composer |
| Directing | Lamont Johnson | Director |
| Writing | Leslie P. Davies | Novel |
| Writing | Douglas Heyes | Screenplay |
| Production | Hal Roach, Jr. | Producer |
| Production | Trevor Wallace | Producer |
| Camera | Michael Reed | Director of Photography |
| Camera | Ron Drinkwater | Focus Puller |
| Production | Earl A. Glick | Executive Producer |
| Directing | Margaret Hanly | Script Supervisor |
| Art | Cam Porteous | Set Designer |
| Directing | Roger Good | Assistant Director |
| Costume & Make-Up | Ilse Richter | Wardrobe Supervisor |
| Production | Harvie McCracken | Unit Production Manager |
| Costume & Make-Up | Phyllis Newman | Makeup Artist |
| Sound | John W. Gusselle | Sound Mixer |
| Editing | Bill Lewthwaite | Associate Editor |
| Editing | Roy Piper | Associate Editor |
| Editing | Frederic L. Knudtson | Associate Editor |
| Production | Frank Arrigo | Associate Producer |
| Crew | Herbert Ewing | Special Effects |
| Crew | Bob Herron | Stunts |
| Crew | David Ostere | Stunt Coordinator |
| Costume & Make-Up | Werner Keppler | Makeup Artist |
