William Overgard was a writer and cartoonist, known for working on Steve Roper and Mike Nomad. William also worked on Silverhawks. He was the writer of the following Thundercats episodes: 10. Mandora – The Evil Chaser 16. The Fireballs of Plun-Darr 23. Mandora and the Pirates 30. Dr. Dometone 36. The Thunder-Cutter 44. Sword in a Hole 85. Side Swipe 100. Exile Isle 108. The Jade Dragon 109. The Circus Train 119. Screw Loose 122. Cracker’s Revenge 126. Swan Song 130. The Book of Omens