Pufnstuf from 1969 to 1970. In 1971 he starred as Colonel Poom on the series Lidsville. Felix Silla starred as Twiki / Odee-x on the series Buck Rogers in the 25th Century from 1979 to 1981. He has also appeared in many films or episodes of TV series including Bonanza, Petticoat Junction, The Girl from U.N.C.L.E., The Monkees, Planet of the Apes, Bewitched, Mary Hartman, Mary Hartman, Mork & Mindy, Star Wars: Episode VI – Return of the Jedi, Meatballs Part II, Star Trek, Spaceballs, Married with Children, Batman Returns, and more.