Foster is abducted from a health spa by aliens and is taken into space, presumably back to the alien homeworld. However, the UFO is damaged and crashes on the moon. While the Moonbase personnel try to free Foster of the alien environmental suit, he wakes up in the steam room back at the health spa.
| Name | Type | Role | |
|---|---|---|---|
| Tony Barwick | Writer | ||
| Reg Hill | Producer | ||
| Gerry Anderson | Executive Producer | ||
| Ken Turner | Director | ||
| Gabrielle Drake | Actor | Lt. Ellis | |
| Basil Moss | Actor | Dr. Harris | |
| Michael Billington | Actor | Col. Foster | |
| Peter Burton | Actor | Perry | |
| Antonia Ellis | Actor | Joan Harrington | |
| George Sewell | Actor | Col. Freeman | |
| Quinn O'Hara | Actor | Sylvia Graham | |
| Ayshea | Actor | Shado Operative | |
| David Healy | Actor | Joe Franklin | |
| Gary Myers | Actor | Capt. Waterman | |
| Jon Kelley | Actor | Skydiver Engineer | |
| Keith Alexander | Actor | Shado Radio Operator | |
| Dolores Mantez | Actor | Nina Barry | |
| Georgina Moon | Actor | Skydiver Operative | |
| Vladek Sheybal | Actor | Jackson | |
| Ed Bishop | Actor | Cmdr. Straker | |
| Mark Hawkins | Actor | Astronaut | |
| Jeremy Wilkin | Actor | Skydiver Navigator | |
| Joseph Morris | Actor | Medic |