John Richard Erdman (June 1, 1925 – March 16, 2019) was an American character actor and occasional film and television director. He appeared in more than 160 films, and television productions between 1944 and 2017, mostly in supporting roles. He is most known for his roles in the classic films, Stalag 17 (1953), and Tora! Tora! Tora! (1970). In his final years, Erdman found renewed fame through his portrayal of Leonard in the critically acclaimed comedy series Community (2009–2015).