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I Know This Much Is True

Episode One

E1    May 9, 2020    60m    TV-MA
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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. As he navigates the fallout, Dominick reflects on their childhood growing up under the tyrannical rule of their volatile stepfather, Ray, and their desire to know the identity of their biological father.
Where to Watch Episode One
Cast of Episode One
  • Mark RuffaloDominick Birdsey / Thomas Birdsey
  • Melissa LeoConcettina Ipolita Tempesta 'Ma' Birdsey
  • Rosie O'DonnellLisa Sheffer
  • Archie PanjabiDr. Patel
  • Kathryn HahnDessa Constantine
  • John ProcaccinoRay Birdsey
  • Rob HuebelLeo
  • Michael GreyeyesRalph Drinkwater
  • Gabe FazioShawn Tudesco / Dominick and Thomas Acting Double
  • Guillermo DíazSergeant Mercado
  • Marylouise BurkeLibrarian
  • Brian GoodmanAl
  • Sandra BerriosSocial Worker at Hatch
  • Laura SilvermanKristin
  • Christine ParksHumanities Department Chair
  • Morgan SullivanOffice Buddy
  • Jake RobardsLandlubbers (voice)
  • Michael GenetThomas' Surgeon
  • María GonzalezMa's Oncology Nurse
  • Rocco MasihiYoung Thomas Birdsey
  • Donnie MasihiYoung Dominick Birdsey
  • Juliette LewisNedra Frank
  • Tim RuddyRobocop

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