[2] In 1930, Stack returned to the U.S., making his American film debut with a featured role in the melodrama, Sarah and Son, starring Ruth Chatterton and Fredric March.
[3] He followed this with an appearance as Travis in Derelict, directed by Rowland V. Lee, and starring George Bancroft, Jessie Royce Landis, and William "Stage" Boyd.
[10] In 1935 he again had several small roles in such films as Rendezvous, where he played a waiter, as a director in The Man Who Broke the Bank at Monte Carlo, and as Sir Phillip in The Perfect Gentleman.
Stack also played the Judge Advocate, another small role, in the classic 1935 version of Mutiny on the Bounty, starring Charles Laughton and Clark Gable.
[13] Stack's final screen performance was as the Butler in the 1945 spy film, Confidential Agent, starring Charles Boyer and Lauren Bacall.