Keith Szarabajka (; ; born December 2, 1952) is an American actor. He is best known for his roles as Mickey Kostmayer on The Equalizer, Daniel Holtz on Angel, Gerard Stephens in The Dark Knight and Adam Engell in Argo. He has also voiced Dr. Terrence Kyne in Dead Space, Harbinger in Mass Effect 2, Herschel Biggs in L.A. Noire and the Didact in Halo 4. Early life Szarabajka was born in Oak Park, Illinois on December 2, 1952, the son of Anne, a school teacher, and Edward Szarabajka, a savings and loan officer. His father was a much decorated veteran of WWII. He fought in North Africa and Italy until the end of the war. He received the Silver Star, two Bronze Stars and the Purple Heart. He attended Campion Jesuit High School in Prairie du Chien, Wisconsin, John Hersey High School in Arlington Heights, Illinois, and the University of Chicago, as well as Trinity University in San Antonio, Texas. He studied acting further at the Organic Theater in Chicago from 1972 to 1978. During this time, he co-wrote "Bleacher Bums" along with, among others, Joe Mantegna and Stuart Gordon. In 1982 he had a supporting role in the Costa-Gavras film Missing. Career His acting resume is extensive, appearing in numerous television programs including The Equalizer, Profit, The X-Files, Becker, Star Trek: Voyager, Star Trek: Enterprise, Charmed, Roswell, 24, Max Steel, The Inside, and Law & Order. In 1994 he portrayed Matthew Stoner in Babylon 5 episode "Soul Mates". He is known for his role as Mickey Kostmayer in the 1980s show The Equalizer, as well as for his recurring role as vampire hunter Daniel Holtz in the cult series Angel, the spin-off from Buffy the Vampire Slayer. He played the lead role in Stephen King's Golden Years. In 2016, he began the recurring guest role of Donatello Redfield in Supernatural, appearing in nine episodes before the show's conclusion in 2020. Szarabajka has contributed his voice to several audio books, notably Fierce Invalids Home from Hot Climates by Tom Robbins, for which he won the 2001 Audie Award for Best Fiction, Unabridged; Fear Nothing and Seize the Night by Dean Koontz; several roles in a Grammy nominated audio dramatization of The Maltese Falcon, Rising Sun by Michael Crichton; Nelson Algren's Walk on the Wild Side; and The Mark of Zorro opposite Val Kilmer. Szarabajka is the voice of Russman