Dan Shea ,Daniel J Shea (born December 23, 1954) is a Canadian actor and stunt coordinator who is best known for his recurring role as Sgt. Siler on Stargate SG-1 and Stargate Atlantis.He is a father to actresses Joey Shea and Stephanie SheaShea was born in Ontario. He was the stunt coordinator and Richard Dean Anderson's stunt double on the same series - Stargate SG-1. He previously served as Anderson's stand-in on MacGyver.