The Streets of San Francisco S04E21 - Superstar

This pilot for the series "Bert D'Angelo Superstar" (which had started its regular run two weeks earlier, and was a total bomb in the ratings) gives Mira Sorvino's dad a role to match his weight and ego: he plays a New York City detective who comes to San Francisco in search of a back-home cop killer, and decides to stay when the villain is caught.