UNITED STATES - FEBRUARY 28:  HAPPY DAYS - "My Favorite Orkan" - Season Five - 2/28/78, This is the first appearance of the alien Mork from Ork (Robin Wiliams, left), which earned him and Williams his own spin-off series, "Mork & Mindy". Mork came to Earth looking for someone to study and picked Richie (Ron Howard, center). Henry Winkler (Fonzie) also starred. ,  (Photo by Walt Disney Television via Getty Images Photo Archives/Walt Disney Television via Getty Images)