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'I Know This Much Is True' Episode 6 Finale Preview: Will Dominick and Thomas find out who their father is?

The last episode saw the introduction of Dominick and Thomas's grandfather, Domenico Tempesta, as Dominick read a translated version of his grandfather's novel

Spoilers for 'I Know This Much Is True' Episode 6

The HBO show has accumulated an intense fanbase so far with its gripping storyline and an excellent cast. Mark Ruffalo's portrayal of both Dominick and Thomas Birdsey is one of the highlights of his career. He brought to life the stories of two twin brothers borrowing from the thread of the events in their lives to how much they need to co-exist because of their dependency. The last episode saw the introduction of Dominick and Thomas's grandfather, Domenico Tempesta (Marcello Fonte) as Dominick read a translated version of his grandfather's novel. It wasn't a pretty story and had very disturbing components from murder to rape and Dominick feels that because his grandfather was cursed for his ways, so was the entire family. Not to mention, in possibly the most horrific of circumstances, Dominick got Thomas released from the Hatch institute as well. 

The finale, we speculate would showcase Dominick taking care of Thomas at home for the first time since Episode 1 where Thomas had had a breakdown and cut his hand off. The social worker involved in Thomas's case, Lisa Sheffer (Rosie O'Donnell) had warned Dominick that while he feels obligated to take care of his brother at home on his own, it might not be the best for Thomas. The trailer and the synopsis also hint that Dominick may find an answer he has been searching for years - will his grandfather's novel reveal the identity of his father? We would assume so, especially with the trailer bringing up that narrative. The twins' Ma (Melissa Leo) had always kept the identity of the boys' father hidden from them and instead, the boys grew under the care of their step-father Ray Birdsey (John Procaccino).

From what we know Ray was an abusive man towards his wife and his stepchildren and we speculate that that narrative will now unravel. Ray has made a few appearances during the five episodes of this season, but we believe the finale will put his background as a father to question. The series has been a really emotional ride and happy scenes are quite rare and almost non-existent - so, we're expecting the finale to be gut-wrenching. Either way, we're expecting Dominick and Thomas to find some sort of balance and peace in their life. We're hoping the finale doesn't leave us on a cliffhanger, but it doesn't matter because every viewer is waiting for Season 2 regardless. 

You can watch the preview released by HBO here.

The synopsis as reported by Cartermatt reads, "A lifetime of animosity between Dominick (Mark Ruffalo) and Ray (John Procaccino) spills over in public at an inopportune time. After an unexpected tragedy, Dominick seeks reconciliation with those he has hurt. The question that has plagued Dominick all his life is finally answered."

The finale of 'I Know This Much Is True' airs Sunday at 9 pm EST on HBO.