Season 4 - Episode Guide

Virginia is dead - but who is responsible? Yvonne masterminds a plot to escape a life sentence. Jim is forced to explain himself to Karen. Josh reveals that he is the father of Crystal's baby and resigns. Al & Maxi continue to takeover.

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.

Fenner is Governor again and Karen is just a P.O. Fenner is horrified to learn that Yvonne didn't murder Virginia and realising the real culprit forces him and Yvonne into an uneasy alliance. Barry and Di's wedding is cancelled with help from the women but Barry reacts and Di ends up with a broken hand.

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.

Yvonne and Maxi come to blows and Tina helps Yvonne in the fight when Virginia's killer is revealed. Denny and Shaz are back together and true to form. Neil continues to make himself unpopular - does he really have the prisoners' interests at heart or is this a personal vendetta against Karen?

Julie J is distraught to find her daughter on G-Wing. Buki is rescued from the escape tunnel at the last minute but has to face the wrath of Shaz and Denny. Neil's sexuality is revealed. Buki reveals the truth about Rhiannon's "boyfriend" leading to the Julies to make the biggest mistake ever.

Fenner finally realises that his boss's interest in him extends far beyond the professional. Shaz and Denny find another opportunity to humiliate Buki but begin to push too far. Karen and Mark Waddle grow closer. Tina and Noreen take over the servary from the Julies.

Buki can no longer cope with the bullying and harms herself, although more seriously than she intended. Outraged, Yvonne wants to see that justice is done. Di and Neil grow closer. The women are not happy with Tina and Noreen's service.

Yvonne and Maxi come to blows resulting in drastic consequences. G-Wing's tiniest inmate arrives when Crystal gives birth to baby Zandra on the floor of her cell. Fenner breaks down when the officers do not co-operate with him. Di sets her sights on Neil, despite Fenner's warnings. Buki wants to be on the MBU with Crystal and Zandra but when a baby goes missing, Buki reveals the truth, as to why she wants to be with babies, to Mark. Karen goes to see Fenner and he gets heavy with her.

Karen struggles to cope following Fenner's assault on her but realises that involving the police will be futile when the whole story comes out. On a day out, Crystal makes a desperate bid to get Zandra away from Larkhall. Buki grows closer to Baxter but his illness claims his life.

Fenner is back in uniform and Neil is in dire need of a new governor. Karen turns down the job which means that there is only one candidate left - Sylvia. Emotions flare following Baxter's funeral. Shaz and Al plan to fight but Maxi wants to finish Shaz. The fight goes ahead with brutal, ultimately, tragic consequences.

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 nowehere 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. 

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. 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.

Yvonne and Fenner both have different reasons to be concerned about Karen's new relationship. Snowball continues to wrap everyone on G-Wing around her little finger and goes ahead with her escape plan. Di and Neil go on their hen and stag nights but Neil only invites Fenner and slips something into his drink.

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.