Reed's cousin is an arson detective in Seattle.
Reed's character Mike Kellerman was originally supposed to be called Mike Driscoll. The producers didn't change the last name to Kellerman until just before shooting began.
One of Reed's favorite Homicide: Life on the Street episode is "Full Moon.".
Reed attended Trinity School in New York City.
Reed and his co-stars in Good Night, and Good Luck were nominated for "Outstanding Performance by a Cast in a Motion Picture" in the 2006 Screen Actors Guild Awards.
Reed's acting debut was in The ABC Afterschool Special when he was seven years old. His film debut was a bit part in the 1976 movie Two Minute Warning.
Reed was the voice who read the audiobook "The Acolyte" by David Compton. He also read David Simon's "Homicide: A Year on the Killing Streets" in 1997.
Reed attended the University of North Carolina at Chapel Hill. He also studied in Julliard School.
Reed's theatrical credits include The Homecoming, Peer Gynt, and Dark.
Reed's mom Allison is an astrologer and his dad Bob Diamond is a stage manager and director of shows like The Joe Franklin Show.
Since 2004, he's been married to Marnie McPhail.
Diamond went to the L.A. Police Academy.
He plays the guitar for a rock band named Chuck Valiant.
Reed is 6'1" (1.85 m).
Reed: (on writers' grievances) The Internet is the next big revenue source for producers, and the people who make those shows deserve to get some of that money.
Reed: (on fans saving "Journeyman") For time traveling, they'd send watches. That might be a little expensive, I don't want to put them out, so maybe calendars or pages from day planners.
Reed: (on "Journeyman") One of the strongest parts of this great show is that Kevin Falls and all the writers so carefully thought everything out. Every question has an answer and questions get resolved or answered quickly as opposed to stringing it out to a point where you just lose interest.
Reed: I feel very lucky because of almost everything I've done, probably the thing I'm most recognized for is The Shield. Shield fans just love that show and that character has played such a large role on that show, it has always been amazing.
Reed: (on "Journeyman") We called it, when we were making the pilot, the time travel show for people who didn't believe in time travel.
Reed: (on changing his look as the younger Jack in "Journeyman") Whenever I travel back in time, my trick is, if I'm the younger Jack Vasser, I just comb my hair down... bangs equals youth.
Reed: I wasn't meant to be anything but an actor, but I found out when I met all of these cops is they all wanted to be actors. So, I thought, OK, here's what I'm going to do -- I'm going to play a cop truthfully, I'm going to honor them.
Reed: (on the writers' strike) Politically, their grievances are all legitimate. I don't think there will be DVDs and commercial television in the way we know. Our computers and televisions are going to be one thing, so people need to figure out how they're going to be paid for that world.