Krasis, High Priest of Atlantis, has been summoned by the Master to help him find the crystal of Kronos. The Master uses TOMTIT to summon threats from the past to attack UNIT.
| Name | Type | Role | |
|---|---|---|---|
| Robert Sloman, Barry Letts | Writer | ||
| Marc Boyle | Guest Star | ||
| George Cormack | Guest Star | ||
| Greg Powell | Guest Star | ||
| Aidan Murphy | Guest Star | ||
| John Wyse | Guest Star | ||
| Simon Legree | Guest Star | ||
| Paul Bernard | Director |