His only scene in this season takes place after Father Mukada suggests 'rec time' for an hour of the solitary inmates. In doing this, Giles shows that while he may have some mental problems, he shows surprising clarity. Glynn was attacked by many prisoners, Samuel came to save him, and was stabbed in the struggle. Glynn later confesses that he always felt responsible because he ignored Samuel's advice to ignore a simple disagreement between prisoners. Giles reluctantly tells Father Ray Mukada that the man responsible for the death of Clayton's father was none other than Warden Leo Glynn.

While Father Mukada is doing his own investigation on who actually killed Samuel Hughes, the father of Clayton Hughes, a guard at OZ, he asks Giles, because Giles was in the prison that day, over 17 years ago. Giles ends up in the hospital ward after suffering a heart attack. Once she finds out, she gives him a box full of toothpaste, toothbrushes, and mouthwash as a thank you present. She discovered that not only did Giles see who killed her husband, but Giles actually killed the man who murdered her husband.

He helps Sister Peter Marie find out more about the murder of her husband years earlier by repeating a series of words that she is able to decipher. He spends the majority of his time in Oz in solitary confinement due to violent outbursts. Though not considered to be insane or otherwise mentally deficient by the prison system, or prison psychiatrist Sister Peter Marie, he speaks in one word riddles and does not carry on normal conversations. Up for parole in 60 years.' ― The Narrator Season 2

Oz tv series intro