Bizarre television comedy with Robin Williams as Mork from Ork, who is an alien sent to Earth in an egg, to investigate Earth and report back to his superiors. As an outsider, Mork is unfamiliar with human customs and often questions some of the strange traditions that we take for granted. Much of the humor relies on Williams' unique comic voices and mannerisms. The show was perhaps most famous for Mork's greeting, 'Nanu Nanu.' 
 
https://www.imdb.com/title/tt0077053/

All 4 seasons 

Enjoy the show and RIP Robin Williams. You will always be remembered.