On 26th century Earth the Doctor discovers a bomb powerful enough to destroy the whole planet. After defusing it, he traces its signal back to a freighter of Cybermen in space...
2/2 The Cybermen are released from their silos and on the march.
First broadcast: 16 Aug 1982
1/2 Silent but deadly androids are protecting a bomb buried beneath the Earth.
First broadcast: 09 Aug 1982
2/2 The Cybermen are released from their silos and on the march.
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