The Doctor, Romana, Adric and K9 encounter the enslaved time-sensitive Tharils, who lead them to a white void occupied only by the ruins of an old building and a spaceship - a dimension that might be the key to escaping E-Space.
Director:
Writer:
Tom Baker
The Doctor
Lalla Ward
Romana
Matthew Waterhouse
Adric
John Leeson
K9 (voice)
Clifford Rose
Rorvik
Kenneth Cope
Packard
David Kincaid
Lane
Freddie Earlle
Aldo
Harry Waters
Royce
David Weston
Biroc
Vincent Pickering
Sagan
Robert Vowles
Gundan
Jeremy Gittins
Lazlo
