With her crew vanishing mysteriously, Captain Briggs assumes the Doctor is the guilty party, but the traitor is closer to home… as are the Cybermen.
Name | Type | Role | |
---|---|---|---|
Eric Saward | Writer | ||
Mark Fletcher | Guest Star | First Crew Member | |
Alec Sabin | Guest Star | ||
June Bland | Guest Star | ||
Beryl Reid | Guest Star | ||
Clare Clifford | Guest Star | ||
David Banks | Guest Star | ||
James Warwick | Guest Star | ||
Mark Hardy | Guest Star | ||
Peter Grimwade | Director |