Bat-like creatures are haunting a contemporary London school. While investigating, the Doctor runs into an old friend, Sarah Jane Smith (Elisabeth Sladen), who's already on the case.
Part 1 of two. Rose finds her father (Shaun Dingwall) alive on a parallel Earth while a sinister plot against British society unfolds.
Conclusion. London falls to the Cybermen while Jackie is usurped by Lumic. Elsewhere, the Doctor, Rose and Mickey plot a strike against the Cyberfactory. Shaun Dingwall. Roger Lloyd Pack.
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