William Lindsey Erwin was an American film, stage and television actor with over 250 television and film credits. A veteran character actor who appeared in Planes, Trains & Automobiles, Somewhere in Time and Home Alone. He was also a stage manager for Edgar Bergen and a security assistant for Clancy. He is widely known for his 1993 Emmy Award-nominated performance on Seinfeld, portraying the embittered, irascible retiree Sid Fields.