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.

Credits

Graeme HarperDirector

Tom BakerThe Doctor

Lalla WardRomana

Matthew WaterhouseAdric

John LeesonK9 (voice)