
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.
The Doctor

Jo Grant

The Master

Brigadier Lethbridge-Stewart

Captain Mike Yates

Sergeant Benton

Galleia

Dr. Ruth Ingram
Stuart Hyde
Dr. Percival
Dr. Cook
Krasis
Hippias
Neophite
Proctor
Kronos
Dalios
Crito
Lakis

Miseus
Minotaur
