The guy who hid behind the eight ball at the start and finish of the show. I want to look for episodes on youtube. 'Twas a 50s-ish show but was rerun in our country in the 60s even up to the 70s. I was born in 1963, btw.
My favorite episodes then was the one about dancing, dentistry, and being a hospital patient (I think it was the first ever scissors-left-inside-patient case.)