Showtime will air season 3 episode 3 of "Ray Donovan" on Sunday, 26 July, in which Ray and Mickey will be seen desperately trying to save Terry, who has killed a fellow prison inmate.

In episode 2, viewers saw how Terry (Eddie Marsan) was struggling to get through with the life in prison and his worsening Parkinson's disease wasn't helping him cope one bit. When a tough-looking inmate and he get into a fight, Terry's boxing training kicks in, allowing him to defeat the guy. However, the opponent isn't satisfied and demands a rematch while guards are not looking.

The tough guy cheats by stabbing Terry in the side, which unleashes his temper. He bashes the fellow prisoner's head with a work-out weight, killing him. Although this clearly shows that Terry's body is still capable of fighting Parkinson's, he is starting to give up.

In the promo for "Come and Knock on Our Door", he tells Ray (Liev Schreiber) that if the dead inmate's friends kill him, they would be doing him a favour, because he can feel his body giving up on him. And although Ray wants to help him, Terry says that he shouldn't try.

But when has that stopped the Donovans? Ray and Mickey (Jon Voight) are doing everything they can to get Terry out of the prison. Mickey is tries to bribe a policeman with drugs, an idea immediately shot down by Ray.

Will the father-son duo be able to save Terry from a prison death? Find out in season 3 episode 3 of "Ray Donovan", which will be aired on Showtime at 9.00 pm (EST) on Sunday, 26 July. You can also live stream "Come and Knock on Out Door" via Showtime Anytime.