Stephen Samuel Kahan (August 6, 1939 – August 4, 2019) was an American character actor, best known for playing Captain Ed Murphy in the Lethal Weapon film series.

He has appeared in fourteen films directed by his cousin Richard Donner: Superman (1978), Inside Moves (1980), The Toy (1982), Lethal Weapon (1987), Scrooged (1988), Lethal Weapon 2 (1989), Radio Flyer (1992), Lethal Weapon 3 (1992), Maverick (1994), Assassins (1995), Conspiracy Theory (1997), Lethal Weapon 4 (1998), Timeline (2003) and 16 Blocks (2006).