Bad Girls: Only the Lonely

Cassie claims that she blackmailed Roisin into helping her, but will Roisin let Cassie add more time onto her sentence or will she tell the truth? Neil Grayling invites Fenner to stay in his spare room, but there's an ulterior motive to his kindness. Hollamby is told to teach IT to the prisoners, but she leaves inmate Barbara in charge, which leads to disaster. Meanwhile, Buki blackmails Shaz and Denny into letting her join them as they dig an escape tunnel, but her interference could end in tragedy.