A full list of his work that is covered by the archive is below, followed by the video of one of his finest works: The GI Joe two-parter, Worlds Without End
Dr Strange And The Mystery Kids
In late 1981, Martin was commissioned by Marvel Productions to write the Preliminary Development document for a potential Dr Strange cartoon pitched to NBC, spinning off the Doctor's appearance in Spider-Man And His Amazing Friends.
NBC balking at some elements of the property that could be interpreted as "satanic", along with Marvel's subsequent refusal to water down the concepts, led to the pitch being rejected.
Martin sold the development script in early 2013: https://www.worthpoint.com/worthopedia/unique-item-dr-strange-fans-411883048
MP 100 The Incredible Hulk
The Creature And The Cavegirl (partial storyboard available)
MP 600 GI Joe
Operation: Mind Menace
Worlds Without End part 1 and 2
Cobrathon (with Rebecca Parr)
MP 5201 My Little Pony
Story Editor for 61 episodes (with Rebecca Parr)
Writer: Fugitive Flowers, part 1 and 2 (with Rebecca Parr)
MP 6610 Bucky O'Hare And The Toad Wars
Kreation Konspiracy (full script available)
93-400 The Tick
Story editor for 6 episodes
Writer: The Tick vs the Breadmaster
Worlds Without End, part 1
Worlds Without End, part 2