Treat Williams plays Colonel Stephen Glen on the NBC global conspiracy drama "American Odyssey."

Nominated for four Golden Globe Awards, two Screen Actors Guild Awards and an Emmy, Williams has twice won the Theater World Award for his work on Broadway.

He began his career on Broadway as Danny Zuko in "Grease" and won the coveted role of Berger in "Hair" not long afterward. He has starred in more than 70 films and television series, including "Prince of the City," "Once Upon a Time in America" "The Deep End of the Ocean," "Things to Do in Denver When You're Dead," and many others.

Recent films include "127 Hours," "Reaching for the Moon," "Barefoot," "Catatonk Blues."

On television, he starred for four years as Dr. Andy Brown in the acclaimed series "Everwood," and has recently been seen on "White Collar" and "Chicago Fire."