With the Doctor missing, Ian, Barbara and Vicki find themselves in danger from the Moroks while the Xerons also try to make contact with them.
| Name | Type | Role | |
|---|---|---|---|
| Glyn Jones | Writer | ||
| Ken Norris | Guest Star | ||
| Michael Gordon | Guest Star | ||
| Lawrence Dean | Guest Star | ||
| Peter Sanders | Guest Star | ||
| Billy Cornelius | Guest Star | ||
| Salvin Stewart | Guest Star | ||
| Bill Starkey | Guest Star | ||
| David Wolliscroft | Guest Star | ||
| Edward Granville | Guest Star | ||
| Mervyn Pinfield | Director |