Libby and Frank are supposed to be getting married, but this is put on hold when Frank disappears on his stag night. Mimi tries to find out the identity of the father of her new baby Cilla.

Frank is still missing and imagines that he is in a parallel universe featuring Doctor Who characters. His ex-wife Monica, having heard that Frank has gone, wants custody of Stella and Liam.

Shane finds security work at the local school and helps a boy being bullied by his twin. Frank is still incarcerated in a psychiatric hospital, unknown to Libby, who tries to move on with her life.

Karen attends the psychiatric hospital as an out-patient and finds that Frank has been there all along.

After weeks of suffering at the hands of his own mental incarceration Frank is almost fully intact of his marbles and is plots his escape. Libby meanwhile has had the dramatic news that Frank's divorce is about to be nullified and they could lose the family home in 24 hours. The solution is for Frank and Libby to get married and the clock is ticking...

It's Carl's 21st birthday, and he gets a job working for the Maguires. However his first job does not go to plan when Kelly steals money which was supposed to go to a business client.

Sita calls the terrorist line in order to teach Chesney a lesson. Shane and Kelly get more than they bargained for when a woman's sexual fantasy, kidnapping, ruins their business.

Mickey and Shane think of a way to make some extra money. Their final idea was to make a child pornography site which contained no nude images and took the credit card details of those who subscribed. Their view on the matter was that they were doing a good thing by using the website as a deterant, however the police didn't see it that way.

Mimi seems to be suffering with insomnia, however her condition deteriorates when she believes that she may have dementia.

Mickey needs somebody to love, He adopts a cat with FIDS (feline AIDS) and meets Philip who also suffers with AIDS in order to learn more about it. Mickey goes to the shop and returns to find Philip dead.

Libby gets her mother a nurse to look after her when she's at work, all doesn't go to plan when Libby's mother mis-treated. Lillian reveals that she has signed over the house to her newly adopted daughter, Bonnie. Bonnie tells Lillian about her life growing up and then commits suicide.

Mimi's transvestite brother turns up, but isn't all he appears to be. The Maguires are still at each others throats, and Chesney is in danger as he and Jackson join the British Alliance Party, and manage to rub them up the wrong way.

Following his sexual encounter with Letitia's headmistress, Miss Heller, Frank has had his final chance with Libby, who seems taken with the mysterious Martin. Shane's theft of Tilly Pucker's wheelchair further strains relations between the Maguire brothers, coming to a head in a showdown with Tilly's minders.

Paddy returns to the Chatsworth estate in a coffin, but are the residents in for a shock? Elsewhere, Karen decides that a childrens entertainment business is the way forward and Mimi gets a new strap-on!.

Avril is busy keeping secrets from her family; with no job and no money, but always a gift to hand, something doesn't quite add up. Mimi has designs on fit jogger Neil, but he's unsure of her advances - because he only wants sex. Mimi is keen to spice up her sex life, but Karen raises concerns about Neil's calorific role-play. When 12-year-old Bean tries to shoplift, Chesney phones her dad, Gorky, who is Chesney's delivery driver, but Chesney soon becomes concerned for Bean's welfare and decides to try and rescue her. And the law finally catches up with Avril when a bailiff arrives; she breaks down and confesses leaving Jackson gobsmacked. Will he and Letitia promise to support her and help pay back all the money she owes?

While cleaning the windows, Jackson spots Letitia kissing Dee Davies in her bedroom. Jackson goes berserk, attacking Dee in front of a social worker who's waiting to assess him and Avril as foster parents. Frank isn't much use in the parent department, staggering to the Jockey and leaving Carl to nurse pox-ridden Stella. Drunken Frank then leaves the pub and accidentally gets on a mini-bus, waking up in a synagogue. He's discovered by Isaac, who promises not to report him because Frank's been sent from God. Frank thanks Isaac for his advice and hospitality by stealing his candelabra and legging it. Karen's fed up with how she's treated in her own pub and plots to get her power back with a card game. Meanwhile, an ambulance is called for the smallest Gallagher. Will she pull through unharmed?

A new gang has rolled into Chatsworth with an unlikely mission - to save the souls of the community.

Dean Lennox Kelly returns for the landmark 100th episode of Shameless, as Mickey give Mimi an ultimatum: either the new boiler goes or he does; and suddenly Micky finds himself on The Jockey sofa.

Aidan's bad behaviour ends up seeing him in court. Patty ends up having to decide the outcome. Cilla's abduction sees Mimi being forced to face her past, as she reasserts herself has head of the Maguire family. Marty and Mickey start to get intimate as they help each other decorate their new flat.

Marty attempts to find a job and ends up turning to crime to tide him over. Kelly discovers that there's a price on Marty's head. Billy is determined to stand up for his rights as a father. Mimi ends up giving him an ultimatum. Mickey's flat is raided by the local police. Marty is confronted by Shane about a secret he left behind in Spain. Kelly is heartbroken agter she is told the truth and doesn't know who to believe.

Billy needs to start pulling his weight and Mimi decides to test his manhood. Ray's skill with numbers ends up being noticed by Micky who plans a trip to the casino. Kelly ends up receiving some shocking news during rehearsal for the local play.

Billy and Mimi find the game is up after Micky finds them in a compromising position. Billy is scared as the Maguire brothers want his blood for daring to marry their mother. Kelly's not sure about keeping the baby and Jamie ends up finding out more than he bargained for after he confronts her at work. Kelly realises she has to be honest with him but will he still want her and the baby. Carl sees a crime being committed but walks past, unaware of the consequences. Billy's stag ends up being a night to remember.