Part Three
Series Episode Number: 586World Premiere: Tue 25 Jan 1983 - 6:50pm GMT [BBC One] (United Kingdom)
First Broadcast: Tue 28 Apr 2015 - 8:00pm EDT [Retro TV]
Running Time: 24 minutes 29 seconds
6.60 Million (UK)
Appreciation Index: 67 (UK)Chart Position: 66 () (UK)
As Tegan and Lon combine to give the Mara access back to reality, the Doctor locates the Great Mind's Eye crystal but realises it is instrumental in the Mara's plan.
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