Dianne Wiest, Gabriel Byrne Dianne Wiest, Gabriel Byrne

In Treatment, HBO's innovative shrink drama, has been renewed for a third season, the network announced.

The five-times-a-week series revolves around the patient sessions of Dr. Paul Weston (Gabriel Byrne), a psychologist who lives in Brooklyn.

In Treatment was one of TVGuide.com's biggest Emmy surprises

Dianne Wiest appeared in both Seasons 1 and 2 as Paul's therapist, Gina, and a rotating cast of actors (Blair Underwood, Embeth Davidtz, Josh Charles, Hope Davis and John Mahoney, to name several) have played his patients.

The casting of Paul's third-season patients has not been announced.

Production is scheduled to begin in New York in early 2010, with the season to air later in that year.