Kathryn Elsbeth Erbe is an American actress. She is best known for her role as Alexandra Eames on Law & Order: Criminal Intent, a spin-off of Law & Order, and Shirley Bellinger in the HBO series Oz.

Law & Order: Criminal Intent is an American police procedural drama television series set in New York City, where it was also primarily produced. Created and produced by Dick Wolf and René Balcer, the series premiered on September 30, 2001, as the third series in Wolf's successful Law & Order franchise. Criminal Intent focuses on the investigations of the major case squad in a fictionalized version of the New York City Police Department set in New York City's One Police Plaza. In the style of the original Law & Order, episodes are often "ripped from the headlines" or loosely based on a real crime that received media attention.