Vila	Michael Keating
Avon	Paul Darrow
Cally	Jan Chappell
Dayna	Josette Simon
Tarrant	Steven Pacey
Zen	Peter Tuddenham
Orac	Peter Tuddenham

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The crew investigate an alien sphere. Cally has a telepathic reaction and teleports across. Dayna, Tarrant and Avon follow and encounter the Ultra, who aim to drain the memories of sentient beings and transfer them to the great 'brain' at the centre of Ultraworld ...

Synopsis taken from TV ZONE SPECIAL issue 30.

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