Na-Nu Na-Nu. After an appearance on Happy Days, Robin Williams brought his wild antics as the quirky, misfit alien Mork to this popular 1978-82 sitcom. Sent to Earth from the planet Ork to study human behavior, Mork lands his egg-like spaceship in Colorado where he befriends-and later falls in love with-Mindy McConnell (Pam Dawber). With Conrad Janis, Elizabeth Kerr, and, in the fourth season, Jonathan Winters as Mearth. 95 episodes on 15 discs. 39 hours. S