After a UFO inexplicably destroys itself less than two miles from Moonbase, a mysterious crystal rock is recovered, causes the person in its vicinity to hallucinate. The rock is eventually transferred to Straker's office, where he hallucinates that SHADO is simply a set for a TV series, he is an actor named Mr. Burns, Moonbase can be reached by stepping through two doors from the main control room at SHADO HQ, and 'Mr. Straker' is not available.
| Name | Type | Role | |
|---|---|---|---|
| Suzanne Neve | Guest Star | Mary | |
| Al Mancini | Guest Star | Conroy | |
| Stuart Damon | Guest Star | Howard Byrne | |
| Charles 'Bud' Tingwell | Guest Star | Beaver James | |
| Ken Turner | Director | ||
| Stephan Chase | Actor | Film Director | |
| Ricardo Montez | Actor | Mexican Bandit | |
| Ed Bishop | Actor | Comdr. Straker | |
| Barnaby Shaw | Actor | John | |
| Grant Taylor | Actor | Gen. Henderson | |
| Wanda Ventham | Actor | Col. Virginia Lake | |
| Norton Clarke | Actor | 1st. Assistant Director | |
| Bill Morgan | Actor | Mexican Bandit | |
| Dolores Mantez | Actor | Moonbase Cmdr. | |
| Stanley McGeagh | Actor | Shado Guard | |
| Michael Billington | Actor | Col. Foster | |
| Paul Greaves | Actor | 2nd. Assistant Director | |
| Norma Roland | Actor | Miss Ealand | |
| Philip Madoc | Actor | Rutland | |
| John Lyons | Actor | Shado Guard | |
| Craig Hunter | Actor | Dale | |
| Basil Dignam | Actor | Cabinet Minister | |
| Anouska Hempel | Actor | Shado Radio Operator | |
| Steven Berkoff | Actor | Astronaut | |
| Peter Halliday | Actor | Doctor | |
| Larry Taylor | Actor | Mexican Bandit | |
| Jack Silk | Actor | Motor Cyclist | |
| Ayshea | Actor | Moonbase Operative | |
| James Marcus | Actor | Shado Operative |