Only the Lonely - S4.E5

Tina was visibly distraught after discovering who murdered Virginia. Neil made himself more unpopular by banning the officers smoking and using the Gym. Yvonne had a catfight with Maxi and to her surprise, Tina joined in to help her! - is this the end of the Peckham Boot Gang? Denny and Shaz' tunnel plan took a possibly tragic twist when Buki found out and demanded to be a part of the operation...a tunnel collapse put her life in danger! Julie J's daughter Rhiannon showed up on G-Wing. Karen seemed to be getting close to Mark but Jim, for some reason, warned her off him. Sylvia's computer class was a disaster because of her less-than-basic skills and with the fact that pornography was found on the second-hand machines. Jim moved in with Neil but...shall we say...(as numerous hints suggested) why exactly did his wife divorce him...?!