
Jamie tries to evade Yeti in the tunnels of the London Underground. Meanwhile, The Doctor and Victoria meet a potential new ally - Colonel Lethbridge-Stewart.

Patrick Troughton's Doctor and his companions Victoria and Jamie investigate strange happenings at a gas refinery run by Chief Robson. Animated recreations of lost episodes help bring this 1960s adventures back to screens.

On an arid planet, the TARDIS trio encounter the Drahvins and the Rills; two species stranded on a planet doomed to explode. Both need the Doctor's help, but the Drahvin leader, Maaga, wants only her people to make it out alive.