Reed Edward Diamond (born July 20, 1967) is an American actor. He is known for the roles of Det. Mike Kellerman on Homicide: Life on the Street, Jason Pillar in season 8 of 24, and recurring character Laurence Dominic on Dollhouse. He also appeared in The Shield, Journeyman, Bones, The Mentalist, Franklin & Bash, and Underground. He had a recurring role on the first two seasons of Designated Survivor as John Foerstel, Director of the FBI, and portrayed Daniel Whitehall / Werner Reinhardt in the Marvel Cinematic Universe (MCU) television series Agents of S.H.I.E.L.D.
Early life and education Diamond was born in Brooklyn, the son of Allison, an astrologer, and Bob Diamond, a director of shows such as The Joe Franklin Show. He was raised in Manhattan and attended the Trinity School.
Diamond attended the University of North Carolina at Chapel Hill for two years, then studied acting at the Juilliard School, where he was a member of the Drama Division's Group 20 (1987–1991).
Career His early roles included guest starring on Law & Order and Class of '96, and such films as Memphis Belle (1990), Clear and Present Danger (1994) and Her Hidden Truth (1995).
His first big break came in 1995 when he joined the cast of Homicide: Life on the Street as Det. Mike Kellerman. Diamond was a regular cast member for Seasons 4–6 before Kellerman was written out at the end of Season 6; but he reprised the role for a two-episode story in the final Season 7. In 2000, a feature-length TV movie was produced to wrap up the series, which saw the return of all the major cast, including Diamond. He made a brief appearance as a police detective in the pilot episode of the 2002 pilot of the series The Shield, as Detective Terry Crowley. He was credited as one of the main cast members and featured prominently in promotional pictures of the show, so as to surprise viewers when he was murdered at the end of the first episode. Roles after that included a re-make of High Noon (2000); Three Days; S.W.A.T. (2003, directed by Diamond's Homicide co-star Clark Johnson); Spider-Man 2 (2004); and Good Night, and Good Luck (2005).
In the 2000s, as well as playing recurring roles in Judging Amy (as Stuart Collins) and Dollhouse (as Lawrence Dominic), Diamond guest-starred on Crossing Jordan, The West Wing, Medium, Numb3rs, CSI: Crime Scene Investigation, Stargate SG-1, Without a Trace, The Mentalist, 24, and Common Law. He portrayed Inspector Jack Vasser in the Fall 2007 NBC series Journeyman until the cancellation of the show in December 2007.
In the 2010s, Diamond appeared in the TNT series Franklin & Bash, as senior HYDRA agent Dr. Daniel Whitehall / Werner Reinhardt in the Marvel Cinematic Universe (MCU) television series Agents of S.H.I.E.L.D., and had roles in Firebreather, Moneyball, Common Law, and Wayward Pines. He played plantation owner Tom Macon on season one of WGN's series Underground.
Personal life Diamond was married to Fredrika Kesten from 1995 to 1997. Since 2004, he has been married to actress Marnie McPhail. They have a daughter.
Filmography
Film Year Title Role Notes 1990 Memphis Belle Sgt. Virgil Hoogesteger 1994 Clear and Present Danger Coast Guard Chief 1995 Assassins Bob 2001 Madison Skip Naughton The Breed Phil 2003 S.W.A.T Officer David Burress 2004 Spider-Man 2 Algernon 2005 Good Night, and Good Luck John Aaron Berkeley Ralph 2006 The Darkroom The Man 2007 Adrenaline Voice of Harvey Meet Bill Paul 2011 Moneyball Mark Shapiro 2012 Much Ado About Nothing Don Pedro 2017 Confessions of a Teenage Jesus Jerk Brother Miller 2019 Avengers: Endgame Werner Reinhardt / Daniel Whitehall Cameo; photograph Our Friend Peter 2020 Pearl Marty Siegel 2023 Off Ramp2025DropRichard
Television Year Title Role Notes 1975 Emergency! Larry 1 Episode 1988 ABC Afterschool Special Gary Farrell 1991 Ironclads Leslie Harmon Television film Loving Garth Watkins 1991–2005 Law & Order Mr. Klein / Christopher Baylor 1992 O Pioneers! Emil Television film 1993 Class of '96 Stephen Sinclair 3 episodes Blind Spot Charlie Television film 1994 Under Suspicion Bill Palmer 1995 Awake to Danger Jeffrey Baker Television film Secrets Thomas Rafferty Television film Her Hidden Truth Clay Devereaux Television film 919 Fifth Avenue Ben Constant Television film Homicide: Life on the Street Detective Mike Kellerman 69 episodes 1996 Full Circle Harry Winslow Television film 1997 Mighty Ducks: The Animated Series Falcone (voice) Episode: "To Catch a Duck" Indefensible: The Truth About Edward Brannigan Eddie Brannigan Jr. Television film 1999 Judging Amy Stuart Collins 19 episodes 2000 Homicide: The Movie Private Investigator Mike Kellerman Television film High Noon Harvey Pell Television film 2001 The Huntress Mike Kaputo 3 episodes Family Law Alan Caldwell Three Days Andrew Farmer Television film 2002 Path to War Duty officer Television film Scared Silent Doug Clifson Television film Presidio Med Will Raymond 2 episodes The Shield Terry Crowley 3 episodes 2003 The Twilight Zone Boyfriend 2004 Crossing Jordan Gordon Kimball The West Wing Dr. Mike Gordon 3 episodes 2005 Medium Jared Swanstrom CSI: Crime Scene Investigation Ray Lester Numb3rs Dr. Kenneth Hill 2006 Stargate SG-1 Major Bryce Ferguson Without a Trace Eric Hayes Vanished Therapist 3 episodes Ghost Whisperer Dr. Martin Schaer 2007 October Road Gavin Goddard Journeyman Jack Vasser 13 episodes 2008 Criminal Minds Craig Bridges 2009 Drop Dead Diva Chad Billmeyer Monk FBI Agent Stone Castle Dr. Cameron Talbot Cold Case Darren Musk Dollhouse Laurence Dominic 13 episodes 2010 24 Jason Pillar 8 episodes Firebreather Barnes (voice) Television film 2011 Law & Order: LA Franklin Citron The Mentalist CBI Agent Ray Haffner 5 episodes 2011–2014 Franklin & Bash Damien Karp 40 episodes 2012 Desperate Housewives Gregg Limon 2 episodes The Glades Councilman Greg Dousett Common Law Robert Yule Bones FBI Special Agent Hayes Flynn 4 episodes Revolution Sergeant Wheatley 6 episodes 2013 White Collar Cole Edwards 2014–2015; 2018 Agents of S.H.I.E.L.D. Werner Reinhardt / Daniel Whitehall 10 episodes 2014–2015 State of Affairs Jules 3 episodes 2015 Wayward Pines Harold Ballinger 8 episodes Minority Report Henry Blomfeld 5 episodes 2016 Underground Tom Macon 10 episodes 2016–2018 Designated Survivor John Forstell 19 episodes 2017 Feud: Bette and Joan Peter 2 episodes 2018 The Purge Albert Stanton 6 episodes2019BillionsEvan RobardsEpisode: "Overton Window" Hawaii Five-0 Claude Nostromo Episode: "Ke iho mai nei ko luna" The Terror: Infamy Colonel Stallings 3 episodes How to Get Away with Murder David Golan Episode: "I'm the Murderer" 2020 13 Reasons Why Hansen Foundry 7 episodes 2021 Leverage: Redemption Fletcher Maxwell 2 episodes Bosch Vincent Franzen 5 episodes 2022 Better Call Saul Sommelier David Episode: "Fun and Games" 2023 Orphan Black: Echoes Tom 10 episodes
Video games Year Title Role Notes 2019 Telling Lies Special Agent Michael Campbell
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