The Doctor now moves to completely overthrow the Company. But the Collector has one last trump card to play.
| Name | Type | Role | |
|---|---|---|---|
| Robert Holmes | Writer | ||
| William Simons | Guest Star | ||
| Richard Leech | Guest Star | ||
| Adrienne Burgess | Guest Star | ||
| Jonina Scott | Guest Star | ||
| David Rowlands | Guest Star | ||
| Roy Macready | Guest Star | ||
| Colin McCormack | Guest Star | ||
| Henry Woolf | Guest Star | ||
| Michael Keating | Guest Star | ||
| Derek Crewe | Guest Star | ||
| Pennant Roberts | Director |