The Cleaner (2008)

Season 1: Episode 4

A mathematics professor uses cocaine to help him publish his research in time. His girlfriend and colleague requests William's help. William tries to stop the professor before he loses everything--his career, personal life, and even his immigrant parents' diner. Meanwhile, William's son discovers a used needle in their house after a dinner party. William realizes that the needle belongs to his former sponsor and must decide whether to cut his sponsor out of his life.