As an unfamiliar actor, he had been mentored into the business by stage actor Jonathan Harris. His first television exposure with Harris was a co-starring role opposite him in the Lost in Space (1965) series. Mumy played Harris's friend, Will ...
[Before Lost in Space (1965)] From the age of four I was a huge comic fan and still am. When "Lost in Space" came along it was like being in a huge comic, so we jumped at the chance of being part of that project and it proved to be a good choice.
Red Hair and Blue Eyes
Charles William Mumy Jr.
San Gabriel, California, USA