Trivia / I Know This Much Is True

• Dyeing for Your Art: After finishing filming his scenes as Dominick, Mark Ruffalo put on 30 pounds to play Thomas.
• In Memoriam: The last episode shows a dedication to Megan Cianfrance McGinnis, writer/director Derek Cianfrance's sister, and Scott Ruffalo, Mark Ruffalo's brother.
• Playing Their Own Twin:
  • Mark Ruffalo portrays identical twin brothers Dominick and Thomas.
  • Philip Ettinger portrays both Dominick and Thomas as young adults.
• Separated-at-Birth Casting: Philip Ettinger looks and sounds a lot like Mark Ruffalo.

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