With the news of Robin Williams' death on Aug. 11, the world mourns the loss of a beloved actor and comedian whose career spanned nearly 40 years.

While he is best known for such blockbuster films as Good Morning, Vietnam, Mrs. Doubtfire, The Birdcage and Aladdin, he got his start in TV (by way of stand-up comedy) as the quirky Mork From Ork. Here are some of his most memorable small-screen appearances over the years.