The Streets of San Francisco/Clown of Death
Special Guest Star: Lynne Marta (Barbara Franco)
Three murders befall a traveling circus, and Stone and Keller suspect a high-wire walker.
Actor Will Hutchins appears in this episode as a circus clown, which was something he wound up doing in real life when his acting career wound down. Hutchins later worked as an NBC studio page when David Letterman had his show on that network, and the popular late-night host made a running gag out of Hutchins' once-successful acting career (he played Sugarfoot in that popular late 1950's Western series) and his circus career.