James Doohan
Prior to his acting career, Doohan served in the 14th Field Artillery Regiment of the 3rd Canadian Infantry Division. He also served as an Artillery Forward Observation Officer (FOO) and pilot. He saw combat in Europe during World War II, including the D-Day invasion of Normandy, in which he was wounded, apparently by friendly fire. After the war, he had extensive experience performing in radio and television, which led to his role as Scotty. Following the cancellation of the original ''Star Trek'' series, Doohan was typecast and had limited success in finding other roles; he returned to play the character in the animated and film continuations of the series, and made frequent appearances at ''Star Trek'' conventions. Provided by Wikipedia