Peter Hermann is an American actor whose career started in the 1990s. He first debuted as Dr. Michael Burke in the soap opera Guiding Light. Afterward, he played David in 3 episodes of Get Real. Between 2002 and 2017, he became known for his recurring character as Trevor Langan in Law & Order: Special Victims Unit. Also in the 2000s, he had roles in the films Swimfan, The Treatment, and United 93. The following decade, Hermann landed acting parts in the movies Edge of Darkness, Just Wright, Too Big to Fail, Trouble with the Curve, Philomena, Chinese Puzzle, and All Is Bright. He also played Harrison Curtis in the TV series Gifted People. He currently stars as Jack Boyle in Blue Bloods and Charles Brooks in Younger.