The Master is behind the Keller Machine and uses it to recruit the rioting inmates at Stangmoor Prison. He plans to capture a missile and fire it at the World Peace Conference.
| Name | Type | Role | |
|---|---|---|---|
| Don Houghton | Writer | ||
| Raymond Westwell | Guest Star | ||
| Roy Purcell | Guest Star | Chief Prison Officer Powers | |
| Ernesto Macias | Guest Star | ||
| Kristopher Kum | Guest Star | ||
| Pik-Sen Lim | Guest Star | ||
| Timothy Combe | Director |