Wednesday, 8th February 1984 6:50PM BBC 1 (46 mins)
In a deserted area of the London Docks, a group of fugitives appear from thin air, and are gunned down by two menacing policemen with futuristic weapons. The Doctor detects and then follows a time corridor, and discovers that a group of mercenaries are trying to liberate Davros from his long cryogenic imprisonment on board a specially constructed prison satellite.