The Monoids abandon the Ark, leaving Steven and the Guardians to die, but a mutiny in their ranks may give the Doctor a chance to bring about peace.
| Name | Type | Role | |
|---|---|---|---|
| Paul Erickson | Writer | ||
| Eileen Helsby | Guest Star | ||
| Brian Wright | Guest Star | ||
| Terence Woodfield | Guest Star | ||
| John Halstead | Guest Star | ||
| Edmund Coulter | Guest Star | ||
| Frank George | Guest Star | ||
| Michael Imison | Director |