Pollard was known for his short stature, which allowed him to play youthful roles well into his twenties. One such role was in the original "" series as the teenage-leader of an all-child planet in the episode "" (1966):Michael J. Pollard is smarmily effective as, in essence, a cult leader for the kids, and the kids themselves manage a perfect blend of creepy, scary, and silly. The cry of “bonk-bonk on the head” is amusing right up until twenty kids pile onto Kirk and he emerges with blood seeping down the sides of his head.