Freeman takes over temporarily while Straker deals with a woman apparently determined to investigate what SHADO is all about.
| Name | Type | Role | |
|---|---|---|---|
| Tony Barwick | Writer | ||
| Reg Hill | Producer | ||
| Jane Merrow | Guest Star | Jo Fraser | |
| Gerry Anderson | Executive Producer | ||
| Alan Perry | Director | ||
| Jeremy Wilkin | Actor | Skydiver Navigator | |
| Keith Alexander | Actor | Lt. Ford | |
| Janos Kurucz | Actor | Russian Astronaut | |
| Dolores Mantez | Actor | Nina Barry | |
| Norma Ronald | Actor | Miss Ealand | |
| Jon Kelley | Actor | Skydiver Engineer | |
| Paul Tamarin | Actor | Russian Astronaut | |
| Mark Hawkins | Actor | Astronaut | |
| Ayshea | Actor | Shado Operative | |
| Gabrielle Drake | Actor | Lt. Ellis | |
| Ralph Ball | Actor | Film Director | |
| Gary Myers | Actor | Skydiver Captain | |
| Ed Bishop | Actor | Cmdr. Straker | |
| Michael Billington | Actor | Col. Foster | |
| Royston Rowe | Actor | Stunt Man | |
| Georgina Moon | Actor | Skydiver Operative | |
| George Sewell | Actor | Col. Freeman | |
| Patrick Jordan | Actor | Russian Base Cmdr. | |
| Antonia Ellis | Actor | Joan Harrington |