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Picking up a distress call from the edge of the known universe, the Doctor and Sarah Jane find themselves on Zeta Minor where a geological team has run afoul of some strange goings on...
as The Doctor
as Sarah Jane Smith
as Sorenson
as Vishinsky
as Salamar
as De Haan
as Ponti
as Morelli
as Braun
as Baldwin
as O'Hara
as Reig
