Dennis Christopher born Dennis Carrelli on December 2 1955 is an American actor He was born in Philadelphia Pennsylvania He is known for playing Dave Stoller in Breaking Away and tragic film buff psychopath Eric Binford in Fade to Black His Golden Globenominated breakthrough role was as Dave Stohler in the comingofage classic Breaking Away 1979 Other roles include American track star Charlie Paddock in Chariots of Fire and Fade to Black science fiction movies like Plughead Rewired Circuitry Man II He has appeared in nearly 40 movies and madeforTV movies since 1975 Television roles include Jack of All Trades in the Profiler TV series Eddie Kaspbrak in Stephen Kings It Desmond Floyd in Jake Speed and in the HBO series Deadwood Christopher has guest starred in two Star Trek episodes the Star Trek Deep Space Nine episode The Search Part II and the Star Trek Enterprise episode Detained He also gueststarred as the demonsorcerer Cyvus Vail in three episodes of Angel Christopher had a reunion with Breaking Away father Paul Dooley again as his son in an episode of TVs Law Order Criminal Intent The two had first played father and son in Robert Altmans A Wedding In December 2006 he played Dr Martin Ruber in the Sci Fi Channel miniseries The Lost Room