The Streets of San Francisco/Underground
Special Guest Star: Leslie Charleson (Donna Sinclair)
Co-Starring: Joe E. Tata (Bobby Waldron), Robert F. Simon (Capt. O'Hare), Ken Lynch (Willy Kurland), Harry Davis (Leo Segal), Jodean Russo (Kay), William Campbell (Johnny Blackwell), Eldon Quick (Lowrey), Francine York (Louise)
Mike and Steve aid Officer Dan Segal, who has gone undercover to find the killers of his brother.