Biography: Aidan Quinn is an Irish-American actor. He made his film debut in 1984 in Reckless. His films include Desperately Seeking Susan, The Mission, Stakeout, Benny and Joon, Legends of the Fall, Frankenstein, and Michael Collins. He played the role of Captain Thomas "Tommy" Gregson in the CBS television series Elementary (2012–2019). Quinn has received two Primetime Emmy Award nominations for his work in An Early Frost (1985) and Bury My Heart at Wounded Knee (2007).