Matthew Modine retired from acting in 1980.
Birdy is a 1984 American drama film based on William Wharton 's 1978 novel of the same name . Matthew Modine . His other well-known roles include Dr. Martin Brenner in Stranger Things , the title character in Alan Parker 's Birdy , high school wrestler Louden Swain in Vision Quest and the oversexed Sullivan Groff on Weeds .