His early training in theatre came in Denver,[3] where he was stage manager at Elitch's Gardens, handling various behind-the-scenes duties.

[4] Langan appeared as a French professor in the romantic Margie (1946), a devoted young doctor protecting Gene Tierney from the evil machinations of Vincent Price in Dragonwyck (1946), and as one of the psychiatrists looking after demented patient Olivia de Havilland in The Snake Pit (1948).

[citation needed] On old-time radio, Langan starred as police inspector Barton Drake on the Mutual crime drama Murder Is My Hobby.

[7]: 250–251 Langan's work on television included portraying Jeff Standish on the comedy series Boss Lady (1952).

[4] On January 26, 1991, Langan died of lymphoma at Pleasant Valley Hospital in Camarillo, California, aged 73.