
The Master, in the guise of Professor Thascalos, has constructed at the Newton Institute in Wootton a device known as TOMTIT - Transmission Of Matter Through Interstitial Time - to gain control over Kronos, a creature from outside time. The creature is summoned but proves to be uncontrollable.

as The Doctor

as Jo Grant

as The Master

as Brigadier Lethbridge-Stewart

as Captain Mike Yates

as Sergeant Benton

as Galleia

as Dr. Ruth Ingram

as Stuart Hyde

as Dr. Percival

as Dr. Cook

as Krasis

as Hippias

as Neophite

as Proctor

as Kronos

as Dalios

as Crito

as Lakis

as Miseus

as Minotaur