In Treatment (TV) Cast
The cast of In Treatment. Updated on July 22, 2025.
66 actors
Gabriel Byrne
as Dr. Paul Weston (106 episodes)

Gabriel Byrne portrays the role of Dr. Paul Weston, a dedicated therapist who navigates the complexities of his own personal life while trying to help his patients.

Uzo Aduba
as Dr. Brooke Taylor (24 episodes)

Uzo Aduba takes on the character of Dr. Brooke Taylor, a skilled and compassionate therapist who provides support and guidance to her clients in her sessions with them.

Julia Campbell
as Olivia (2 episodes)

Julia Campbell portrays Olivia, one of Dr. Paul Weston's patients. Olivia seeks therapy to explore and confront the challenges in her own life, as she navigates relationships and personal growth.

Lauren Hodges
as Natalie Barnett (2 episodes)

Lauren Hodges steps into the role of Natalie Barnett, another patient of Dr. Paul Weston. Natalie brings her own unique set of issues and struggles to therapy, as she works through them with Dr. Weston's guidance.

Peter Horton
as Zach (1 episode)

Peter Horton embodies the character of Zach, who seeks therapy to address his own personal demons and find ways to overcome the obstacles in his life through the sessions with his therapist, Dr. Paul Weston.

Jake Richardson
as Ian Weston (1 episode)

Jake Richardson plays the role of Ian Weston, Dr. Paul Weston's teenage son. Ian's presence in the series allows for exploration of the complexities that arise within the doctor's personal life and the impact they have on his professional practice.

Chris Heuisler
as Man (1 episode)

Chris Heuisler appears as the Man, a character who interacts with Dr. Paul Weston while offering a unique perspective on therapy and the challenges faced by those seeking mental health support.

Laila Robins
as Tammy Meswick (4 episodes)

Laila Robins takes on the role of Tammy Meswick, a former patient of Dr. Paul Weston who returns to therapy seeking assistance with new challenges. Tammy's storyline provides insight into the long-term effects of therapy and the ongoing nature of personal growth and healing.

Keith Nobbs
as Eli (1 episode)
Amanda Axelrod
as Melissa (1 episode)
Max Burkholder
as Max Weston (2 episodes)
Michelle Forbes
as Kate Weston (14 episodes)
Glynn Turman
as Alex Prince Sr. (4 episodes)
Sherri Saum
as Bess (6 episodes)
Alex Wolff
as Max Weston (7 episodes)
Susan Misner
as Wendy (2 episodes)
Sonya Walger
as Julia (2 episodes)
Samrat Chakrabarti
as Arun Sanyal (1 episode)
Dendrie Taylor
as Marisa (1 episode)
Joseph Siravo
as Roberto D'Amato (1 episode)
Brian Shortall
as Darren (1 episode)
Patrick Cavanaugh
as Pizza Delivery Guy (1 episode)
Sonya Maddox
as Michaela Prince (1 episode)
Drew Matthews
as Roy Prince (1 episode)
David Norona
as Daniel Alterio (1 episode)
Lawrence LeJohn
as Man at Funeral (1 episode)
Mike Doyle
as Bennett (1 episode)
Michael Gargani
as Henry (1 episode)
Bruce-Robert Serafin
as Train Passenger (1 episode)
Russell Hornsby
as Luke (6 episodes)
Shawna Christensen
as Woman (1 episode)
Blair Underwood
as Alex Prince (9 episodes)
Mia Wasikowska
as Sophie (9 episodes)
Josh Charles
as Jake (8 episodes)
Embeth Davidtz
as Amy (8 episodes)
Chad Gittens
as Courier (1 episode)
Madeline Zima
as Karla (1 episode)
Dianne Wiest
as Dr. Gina Toll (16 episodes)
Hope Davis
as Mia Nesky (7 episodes)
Alison Pill
as April (7 episodes)
Aaron Grady Shaw
as Oliver (7 episodes)
John Mahoney
as Walter Barnett (7 episodes)
James A. Stephens
as Paul's Father (1 episode)
Jake Choi
as Notary Public (1 episode)
Jacquelyn Reingold
as Anita (1 episode)
Irrfan Khan
as Sunil Sanyal (7 episodes)
Debra Winger
as Frances Greer (7 episodes)
Dane DeHaan
as Jesse D'Amato (7 episodes)
Amy Ryan
as Adele Brouse (8 episodes)
Cassandra Palacio
as Elaine (1 episode)
Ashleigh Banfield
as Ashleigh Banfield (1 episode)
Mae Whitman
as Rosie Weston (5 episodes)
Joel Kinnaman
as Adam (8 episodes)
Charlayne Woodard
as Rhonda (4 episodes)
Melissa George
as Laura Hill (8 episodes)
Anthony Ramos
as Eladio Restrepo (6 episodes)
John Benjamin Hickey
as Colin Craft (6 episodes)
Quintessa Swindell
as Laila Green (6 episodes)
Liza Colón-Zayas
as Rita Ortiz (6 episodes)
James Lloyd Reynolds
as Steve (1 episode)
Robyn Rikoon
as Izzy (1 episode)
Rachel Brosnahan
as Eating Disorder Girl (1 episode)
Guy Boyd
as Doctor (1 episode)
Natalie Carter
as Prison guard (1 episode)
Gilbert Cruz
as Prison guard (1 episode)
Curtis Shumaker
as Prison guard (1 episode)
For the best insights and data about the TV show In Treatment, visit our main In Treatment page.