First episode of a two-part story. Starsky and Hutch collect a colleague from the airport, but soon after the man is struck down by a deadly disease caught from a passenger on the same flight. The streetwise Detectives must spring into action to find the carrier - an international assassin planning to make a hit on a major syndicate chief - as the entire city becomes threatened with the spreading, lethal virus...

Conclusion of this two-part story. Hit-man Callendar, the carrier of the deadly plague, is still at large, and the disease has now claimed Hutch as its latest victim. With his partner hours from death, Starsky races against time to track down Callendar to obtain an anti-toxin...