Watch Shameless Season 3 in Australia

When five year-old Liam denounces religion at his RC Primary School and is subject to a home-visit by his teacher and the local priest, sister Debbie has to think fast. But shaving his head and pretending that he is dying of cancer is NOT one of Debbie's better ideas. In fact, by the time the rest of the Gallagher clan realise what's going on and try to set the record straight, the news has leaked out into the wider community and Debbie's lie lands the family in true Gallagher-style catastrophe. Could things get any worse for Debbie?

Ian meets Jack and soon begins an affair with him. What will Kash say if he learns the truth, and more importantly, why is Jack behaving suspiciously?

Mandy goes into labour after a run in with a masked robber inside the corner shop. Lip desperately wants to visit his new daughter, but will Mandy's parents allow the visit? And if not, just what will it take for Lip to prove himself to them...?

When Carol discovers her best friend Lillian had an affair with her husband back in the seventies, she takes revenge by reporting her to the DSS for benefit fraud. Frank Gallagher, who has been posing as Lillian's dead husband and claiming his benefits, comes under suspicion.

On the day that Kev should be happily celebrating his 35th birthday, his mother throws herself from her balcony. To add to his woes, he sees his ex-wife Roxy, who's recently out of prison and far from reformed, at the funeral. Fatherhood has had a positive effect on Lip and Mandy.

The Gallagher clan can't believe it when Carl starts to bring money into the household - but his mini-enterprise involves growing cannabis for the Maguires and the police are quick to bust him. Lip is jealous when Mandy gets a new boyfriend and he later discovers that she was the brains behind Carl's business.

Debbie has a new best friend who is everything she wants to be and has the boys falling at her feet. Suddenly Debbie realises what other girls her own age have been getting up to and what she's been missing out on while left holding the fort at home. Sue disappears leaving Marty to deal with the debt collectors in the only way he knows how.

In preparation for her wedding to Frank, Sheila commissions the building of a conservatory in her back yard - but she suddenly remembers her first husband is buried under the patio. Veronica's last stab at IVF on the NHS fails, so she hatches a macabre plan to raise cash for private treatment.