 In this episode, Spectrum launch a manhunt for Captain Black after a failed break-in at an atomic centre turns him into a radioactive source.Captain Black (voiced by Donald Gray) breaks into the Culver Atomic Centre but is discovered by security guards.While making his escape he is forced to enter a radioactive area, where he is exposed to an isotope that renders him detectable on long-range Geiger counters for the next 48 hours.