The time travellers have escaped from the Daleks, but left a vital piece of the TARDIS behind. Getting it back will mean pushing the Thals to mount a dangerous operation.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Michael Summerton | Guest Star | ||
| Virginia Wetherell | Guest Star | ||
| Robert Jewell | Guest Star | ||
| Jonathan Crane | Guest Star | ||
| Marcus Hammond | Guest Star | ||
| David Graham | Guest Star | ||
| Gerald Taylor | Guest Star | ||
| Kevin Glenny | Guest Star | ||
| Philip Bond | Guest Star | ||
| Peter Hawkins | Guest Star | ||
| Chris Browning | Guest Star | ||
| Katie Cashfield | Guest Star | ||
| Kevin Manser | Guest Star | ||
| Vez Delahunt | Guest Star | ||
| Alan Wheatley | Guest Star | ||
| Ruth Harrison | Guest Star | ||
| John Lee | Guest Star | ||
| Christopher Barry | Director |