| The Shy Beast | 1984 |
| Series Contributed To | |
| Star Trek: The Original Series | |
| 34. Dreams of the Raven | 1987 |
| Star Trek: The Next Generation | |
| 3. The Children of Hamlin | 1988 |
| The Devil's Heart | 1988 |
| 12. Doomsday World (with Peter David, Michael Jan Friedman, Robert Greenberger) | 1990 |