Cyberman Breaks Out Of The Sewer
With the Cybermen in the sewers of London, UNIT have to stop them before they break out onto the streets.
With their invasion plan failed, the Cybermen threaten the Earth with a Cyber megatron bomb which will destroy all life on the planet. The Doctor and Tobias Vaughn race to turn off the radio transmitter which is beaming a homing signal for the bomb, but where are the guards? As it turns out, not that far away.