sentences:  His final performance was as the lead in a 1927 farce, "Storm Center".With the onset of talking pictures, Mack moved to Hollywood, where his first credit was for writing the script for the 1929 film "Rio Rita", which would become the most successful film of the year for the newly formed studio RKO Radio Pictures.Staying at RKO, he moved into directing for his next project, the 1930 domestic drama, "Second Wife".