Reed Diamond is an American actor. His acting career started in the late 1970s. However, he only became active in the 1990s. During this period he appeared in the films Memphis Belle and Assassins. He also had roles on the TV shows Loving, Law & Order, and O Pioneers!. He then became known for his role as Detective Mike Kellerman on the TV series Homicide: Life on the Street. After this show ended, he played Stuart Collins on Judging Amy. In the 2000s, he became known for his role as Dr. Mike Gordon on The West Wing, as well as for playing Laurence Dominic on Dollhouse. More recently, he’s had recurring roles on Bones and Agents of S.H.I.E.L.D.. He now stars on the show Designated Survivor.