Trapped on the Sense-Sphere, the Doctor and his companions find three deranged human survivors who have been fighting a guerilla war against the Sensorites.
| Name | Type | Role | |
|---|---|---|---|
| Peter R. Newman | Writer | ||
| Stephen Dartnell | Guest Star | ||
| Martyn Huntley | Guest Star | ||
| Peter Glaze | Guest Star | ||
| Giles Phibbs | Guest Star | ||
| Eric Francis | Guest Star | ||
| Anthony Rogers | Guest Star | ||
| Joe Greig | Guest Star | ||
| Arthur Newall | Guest Star | ||
| Ilona Rodgers | Guest Star | ||
| Frank Cox | Director |