I Know This Much Is True_
"You don't just give up on the people you love."
The parallel lives of identical twin brothers Dominick and Thomas Birdsey in an epic story of betrayal, sacrifice and forgiveness set against the backdrop of 20th century America.
Created By
Derek Cianfrance
Network
HBO
Episodes
6
Updated Feb 16, 2026
WHERE TO WATCH
Max
8 countries
Movistar Plus+ Ficción Total
1 country
Crave
1 country
JioHotstar
1 country
V
VI movies and tv
1 country
Now TV
1 country
DROPTHE_ GOSSIP
Overview
I Know This Much Is True has 1 season with 6 episodes spanning 2020.
Cast
Mark Ruffalo →
Mark Ruffalo stars as Dominick Birdsey / Thomas Birdsey in I Know This Much Is True.
Mark Ruffalo →
Rating
With a 7.6/10 rating from 265 votes, I Know This Much Is True is considered highly rated.
Year context
I Know This Much Is True first aired 6 years ago in 2020.
CAST (9)
Mark Ruffalo
Dominick Birdsey / Thomas Birdsey
Melissa Leo
Concettina Ipolita Tempesta 'Ma' Birdsey
Rosie O'Donnell
Lisa Sheffer
Archie Panjabi
Dr. Patel
Kathryn Hahn
Dessa Constantine
John Procaccino
Ray Birdsey
Rob Huebel
Leo
Michael Greyeyes
Ralph Drinkwater
Gabe Fazio
Shawn Tudesco / Dominick and Thomas Acting Double
SEASONS (1 season, 6 episodes)
SEASON 1Miniseries
01
Episode One
After paranoid schizophrenic Thomas Birdsey has a violent public breakdown, Dominick Birdsey finds himself stepping up to defend his identical twin brother in unexpected ways.…
02
Episode Two
Tensions rise between Dominick and his live-in girlfriend, Joy, as the media begins to take an interest in Thomas' case. In his attempt to have…
03
Episode Three
Sheffer preps Dominick for a pivotal hearing with Hatch’s review board that could decide Thomas’ fate. A chance encounter with an old classmate brings painful…
04
Episode Four
Despite the protestations of those closest to him, Dominick returns to work before fully recovering from his accident. Heavily medicated, Dominick recalls the disturbing incident…
05
Episode Five
Upon learning the details of his Sicilian grandfather's arrival in the early 1900s to Three Rivers, Dominick becomes convinced his family is cursed. A startling…
06
Episode Six
A lifetime of animosity between Dominick and Ray spills over in public at an inopportune time. After an unexpected tragedy, Dominick seeks reconciliation with those…
SERIES INFO
1
Seasons
6
Episodes
60 min/ep
Per Episode
Ended
Status
CREW
Creator
Derek Cianfrance
NETWORKS (1)
HBO
DETAILS
FREQUENTLY ASKED QUESTIONS
What is I Know This Much Is True about?
The parallel lives of identical twin brothers Dominick and Thomas Birdsey in an epic story of betrayal, sacrifice and forgiveness set against the backdrop of 20th century America.
Where can I watch I Know This Much Is True?
I Know This Much Is True is available on Max, Movistar Plus+ Ficción Total , Crave, JioHotstar, VI movies and tv. Availability varies by region.
How many seasons does I Know This Much Is True have?
I Know This Much Is True has 1 season with 6 episodes total.
Who created I Know This Much Is True?
I Know This Much Is True was created by Derek Cianfrance.
Who stars in I Know This Much Is True?
The cast of I Know This Much Is True includes Mark Ruffalo, Melissa Leo, Rosie O'Donnell, Archie Panjabi, Kathryn Hahn.
What is the rating of I Know This Much Is True?
I Know This Much Is True has a rating of 7.6 out of 10 based on 265 votes on TMDB.
Is I Know This Much Is True still running?
I Know This Much Is True has ended. The final episode aired on .
GENRES (1)
Drama
