As UNIT forces approach, the Master leaves for Atlantis in his TARDIS. However, the Doctor is not far behind and in the time vortex, the two Time Lords confront each other.
| Name | Type | Role | |
|---|---|---|---|
| Robert Sloman, Barry Letts | Writer | ||
| George Lee | Guest Star | ||
| Simon Legree | Guest Star | ||
| Marc Boyle | Guest Star | ||
| Paul Bernard | Director |