The third season of the HBO drama series In Treatment will premiere with two back-to-back half-hour episodes on Monday Oct. 25 and two more episodes on Tuesday Oct. 26. A reminder, this is the first completely original season of the therapy drama. The Israeli series it is based on ran for 2 seasons. Joining Gabriel Byrne, who returns as Dr. Paul Weston, are new cast members Irrfan Kahn, Debra Winger, Dane DeHaan and Amy Ryan.