<Tr> <Th> Starring </Th> <Td> Lee Majors Douglas Barr Heather Thomas Jo Ann Pflug (1981--1982) Markie Post (1982--1985) </Td> </Tr> <Tr> <Th> Theme music composer </Th> <Td> Gail Jensen Glen A. Larson David Somerville </Td> </Tr> <Tr> <Th> Opening theme </Th> <Td> "Unknown Stuntman" performed by Lee Majors </Td> </Tr> <Tr> <Th> Composer (s) </Th> <Td> William Broughton Ken Heller Stu Phillips Morton Stevens </Td> </Tr>

Who sang the theme song to the fall guy