He appeared in many adaptations of/and original plays on TV during the Golden Age of Television, including an adaptation of "Arsenic and Old Lace" in which he played Mortimer Brewster, the role that Cary Grant played in the 1944 film version. To many modern viewers, he is primarily known as a soap opera actor.
His best film role was as Christian de Neuvillette in the 1950 film version of Cyrano de Bergerac (1950), starring José Ferrer in his Oscar-winning role as Cyrano.