Starsky & Hutch (1975) : 3x9

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...