The smash spin-off from a `Happy Days' episode about a wacky alien from the planet Ork and the sweet-natured woman who teaches him how to adapt on planet Earth. When the show launched in September 1978, it became an instant hit with its mix of frenetic comedy, sci-fi slapstick and a star-in-waiting (master of improv Robin Williams) in the lead. Multiple cast and time-slot changes---not to mention bizarre storylines like Jonathan Winters playing Mork's baby---ultimately alienated fans.