
The TARDIS arrives on the unnamed planet of the Gonds, who are ruled and taught in a form of self-perpetuating slavery by the alien Krotons — crystalline beings whose ship, the Dynatrope, crash-landed there thousands of years earlier after being damaged in a space battle. The Krotons are in suspended animation, in a crystalline slurry form, awaiting a time when they can be reconstituted by absorption of mental energy. Periodically, the two most brilliant Gond students are received into the Dynatrope, nominally to become "companions of the Krotons", but in truth to have their mental energy drained, after which they are killed.

Patrick Troughton
The Doctor

Frazer Hines
Jamie McCrimmon

Wendy Padbury
Zoe Heriot


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January 18, 1969
1h 40m
6.4
David Maloney
Robert Holmes
7


BBC
GB

James Copeland
Selris

James Cairncross
Beta

Gilbert Wynne
Thara

Philip Madoc
Eelek

Terence Brown
Abu

Madeleine Mills
Vana

Richard Ireson
Axus
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