Bad Girls (series 4)

Yvonne's escape attempt is thwarted by Karen. New Governor, Neil Grayling, arrives at Larkhall and is determined to make his mark. He is unimpressed with Karen and starts to look for a new Wing Governor - surely not Fenner? Di meets new P.O Barry Pearce but he is not so nice while Fenner and Karen split up.

Denny arrives back on G-Wing, with two new inmates, Cassie Tyler and Roisin Connor. Not only is Shaz blanking her, she's also disappointed to learn that she still has her old enemy Sylvia to contend with. But Denny undergoes a makeover to get close to Al, just to help Yvonne catch Virginia's murderer. Barry turns very nasty when the women interfere with his relationship with Di again but this time Di will not back him up.

Sylvia now has a dead body on her hands but an inspection team are also visiting the prison. Tina decides to clear the air with Maxi, who is nowhere to be found. Cassie and Roisin's relationship deteriorates further especially when Cassie has her eyes on Yvonne. Roisin begins to use drugs as a way of relieving her pain. Yvonne is delighted when her estranged son visits her. Plus, Babs and Henry grow closer, but Henry grasses on the women.

The departure of Shaz has left a vacant cell on G-Wing, though it is immediately filled by a mystery American blonde, Snowball Merriman, who catches Fenner's eye. But Yvonne recognises her as does Karen recognise Yvonne's son. Denny spends her birthday down the block when she attacks Sylvia, upon discovering Shaz is gone. Neil orders Sylvia to find Jesse, for Denny's sake. Di attempts to seduce Neil. The Julies go to court following their assault on Damien, with Rhiannon having no intention of helping her mother or aunty.

Rhiannon tries to make amends with her mother and aunty when they are sentenced to 8 years. Denny is thrilled when her mother is found, but her excitement is short-lived. Di has a suggestion for Neil, giving her companionship she craves and Neil an ideal means of staying in the closet. Roisin goes back on the drugs. Crystal is released and Mark is transferred to another prison, but Mark has a word with Fenner before leaving.

G-Wing's open day goes ahead - but not according to plan. Shaz and Denny have their interprison visit and Shaz has brought some mushrooms with her. Yvonne gets a male escort to visit her during the open day and finds out about Snowball's escape plan. Neil and the inmates' lives hang in the balance when Snowball's escape plan finally detonates.