Fireball XL2 has crashed on Planet Monotane and Fireball XL5 is sent to investigate only to run into a sort of space dinosaur.
| Name | Type | Role | |
|---|---|---|---|
| Sylvia Anderson | Writer | ||
| Gerry Anderson | Writer | ||
| David Graham | Guest Star | ||
| John Bluthal | Guest Star | ||
| John Kelly | Director |