"What sin could a man commit..."

Another MSTie two-fer: Langan played Captain Ross in experiment #104 (Women of the Prehistoric Planet) and, more notably, Lt. Col Glenn Manning in experiment #309, The Amazing Colossal Man!

He played roles on Broadway, radio, and television, in addition to his movie career, continuing to work until his final appearance in 1971's The Andromeda Strain.

He died in 1991 at the age of age of 73.