Drama

I Know This Much is True: all seasons, episodes and where to watch

Name: I Know This Much is True
Genre: Drama
Cast: Mark Ruffalo, Mark Ruffalo, Kathryn Hahn, John Procaccino, Rob Huebel

HBO drama series (2020–2020), 1 season.

Season complete HBO Listings updated October 7, 2026 Listings

Quick answer · Season 1

I Know This Much is True is a drama series that aired on HBO, running from 2020 with 1 season and 6 episodes. I Know This Much is True has ended. Its final episode aired on June 14, 2020.

U.S. premiere: May 10, 2020
Where: HBO
Time: Varies by station
Episodes: 6
Finale: June 14, 2020

📖 Based on a book: I Know This Much is True is based on I Know This Much Is True by Wally Lamb. See the book and reading order →

Where to watch I Know This Much is True season 1 in the U.S.

Where to watch I Know This Much is True season 1 in the U.S.
Where	How	When	Notes
HBO	Broadcast (free)Antenna / cable	May 10, 2020 – June 14, 2020	Original U.S. run on HBO. [1]

Season 1 episode schedule

I Know This Much is True season 1 U.S. episode schedule
Ep.	U.S. date	Time	Status
1	Sun, May 10, 2020 ^[1]	Check local listings national slot	Listed
2	Sun, May 17, 2020 ^[1]	Check local listings national slot	Listed
3	Sun, May 24, 2020 ^[1]	Check local listings national slot	Listed
4	Sun, May 31, 2020 ^[1]	Check local listings national slot	Listed
5	Sun, Jun 7, 2020 ^[1]	Check local listings national slot	Listed
6	Sun, Jun 14, 2020 ^[1]	Check local listings national slot	Listed

Dates are U.S. dates. Broadcast times are the network's national slot; your local station may differ.

About I Know This Much is True

I Know This Much is True is a drama series that aired on HBO, running from 2020 with 1 season and 6 episodes. I Know This Much is True has ended. Its final episode aired on June 14, 2020.

Season 1: Season 1 of I Know This Much is True aired from May 10, 2020 to June 14, 2020 on HBO (6 episodes).

Network / service: HBO (first aired May 10, 2020)
Official site: hbo.com
Main cast over the series (TVmaze): Mark Ruffalo (Thomas Birdsey), Mark Ruffalo (Dominick Birdsey), Kathryn Hahn (Dessa Constantine), John Procaccino (Ray Birdsey), Rob Huebel (Leo)

Common questions

How many seasons of I Know This Much is True are there?

I Know This Much is True has 1 season and 6 episodes listed, airing from May 10, 2020 to June 14, 2020.

Is I Know This Much is True cancelled or ended?

I Know This Much is True has ended. Its final episode aired on June 14, 2020.

Where can I watch I Know This Much is True?

I Know This Much is True originally aired on HBO in the U.S. Streaming rights for older seasons change over time, so check HBO's own app and the major streaming services for the current home.