Martin took the setback in stride, signed a new contract with Screen Gems, and the band recorded his "The Door into Summer" (with title inspired by Robert A. Heinlein's novel).
Nilsson also covered some of Martin's songs, including "Fairfax Rag" and "City Life".
Shortly after their initial collaboration, Nilsson's film The Point would feature Martin's voice talent in the character of the Rockman.
Martin also wrote the song "Evergreen (Earth Anthem)", recorded by Cyrus Faryar, The Turtles, Dan Fogelberg and others.
His voice skills also earned him roles in numerous animated series, including Teenage Mutant Ninja Turtles (taking over the character of The Shredder after James Avery's departure from the role), Transformers, Challenge of the GoBots, and several Star Wars video games.