No one can forget Gary in his three-toned blue and silver space outfit when he guest starred in Universal Studios’ Buck Rogers in the 25th Century. The short lived NBC series ran from 1979-1981 and starred Gil Gerard and Erin Gray.
Gary played a character called Hieronymous Fox in an episode titled Cosmic Whiz Kid in 1979. He also appeared again as the same character in episode: A Blast for Buck in 1980.
In the above photo, Gary appears with Twiki, played by actor Felix Silla. In the photo below, Gary shows off his lovable cheeks. In another photo, he appears mature for his age (he was 11 or 12 at the time) and calm, cool and collected.