HDavid Gerrold
- The Original Series Episode 213: The Trouble with Tribbles (December 29, 1967)
- The Animated Series Episode 105: More Tribbles, More Troubles (October 6, 1973)
- The Animated Series Episode 202: Bem (September 14, 1974)
- The Original Series Episode 319: The Cloud Minders (February 28, 1969)