Mork & Mindy
Mork's appearance proved so popular with viewers that it led to the spin-off television sitcom Mork & Mindy, which co-starred Pam Dawber, and ran from 1978 to 1982; the show was written to accommodate his extreme improvisations in dialog and behavior. Although he portrayed the same character as in Happy Days, the series was set in the present in Boulder, Colorado, instead of the late 1950s in Milwaukee. Mork & Mindy at its peak had a weekly audience of 60 million and was credited with turning Williams into a "superstar." According to critic James Poniewozik, the series was especially popular among young people as Williams became a "man and a child, buoyant, rubber-faced, an endless gusher of the invention."