The late and great Earle Hyman is most famous for his role as Russell Huxtable or "grandpa" on The Cosby Show. However, what most people don't know is that he was the voice of Panthro on ThunderCats. Hyman's career goes way back to when he started on Broadway in the 1943 production of Run, Little Chillun. His stage career remained strong and steady all the way through to the early '80s, where he then turned his talents to television.
He voiced Panthro of the ThunderCats for five years, from 1985 to 1990 and also played Russell Huxtable at the same time. He even received an Emmy nomination for his role as Bill Cosby's character's father. He played this role so believably, even though he was only eleven years older than Bill Cosby at the time.