Noth made his first appearance in the pilot episode "Prescription for Death" (he also appeared in the original pilot "Everybody's Favorite Bagman" in 1988). He was fired from the show after the fifth season. Personality differences between Noth and creator Dick Wolf settled down long enough to film a Logan-centric TV movie, Exiled: A Law & Order Movie in 1998.
After Law & Order, Noth scored a strong comeback when he took on the role of Carrie Bradshaw's enigmatic on-again, off-again boyfriend "Mr. Big" on HBO's Sex and the City. Noth played the role for six years from 1998-2004, and later reprised it in 2008 for the film version of the series and it’s sequel in 2010.
In 2005, Noth returned to the role of Mike Logan on Criminal Intent, joining the show in its fifth season following a guest appearance on the fourth season episode "Stress Position". On this spin-off of the original Law & Order, Noth's detective team alternated episodes with Vincent D'Onofrio and Kathryn Erbe's characters. Noth left CI and the role of Mike Logan for good in 2008 (and went on to have another strong supporting role on the CBS drama series The Good Wife, starring Julianna Margulies).
|Law & Order|
Final Cast: Jeremy Sisto • Anthony Anderson • S. Epatha Merkerson
Final Cast: Sam Waterston • Alana De La Garza • Linus Roache
|Law & Order: Criminal Intent|
Final Cast: Vincent D'Onofrio • Kathryn Erbe • Jay O. Sanders • Julia Ormond