Who's to say Tommy isn't getting out so he can die? He tried to kill himself and Ryan. Maybe that's his plan. Tommy does exactly what he wants, he wants Ryan but also suspect his 'old life' i mean he went back to HB the first time he got out not knowing about Ryan. He doesn't know any other life.
He can't have Ryan in prison, to him I think killing Ryan is his FU to Catherine.
But I also don't think he will succeed. He will just die himself. (Hopefully very painfully)
But before all that we will see Ryan accept that his father was a monster. That way the show ends us all knowing that him and Catherine will be just fine.
Catherine and Claire will make up.
I don't know how it'll all happen but that's what I want..