Landing at the South Pole, the travellers find that Earth's twin planet is disrupting a space mission. The Doctor predicts that they will soon receive visitors from the new planet.
Name | Type | Role | |
---|---|---|---|
Kit Pedler | Writer | ||
Shane Sheldon | Guest Star | ||
Alan White | Guest Star | ||
Earl Cameron | Guest Star | ||
David Dodimead | Guest Star | ||
Dudley Jones | Guest Star | ||
Christopher Matthews | Guest Star | ||
Robert Beatty | Guest Star | ||
Steve Plytas | Guest Star | ||
John Brandon | Guest Star | ||
Derek Martinus | Director |