It's a grand occasion as the residents of Chatsworth celebrate being awarded an Olympic ring from London 2012. The Maguires toast the expansion of their empire: Mimi's hijacked control of the local school via the PTA and Shane's setting up a new business venture. Business is booming, but the family is thrown into turmoil when Jamie makes a shocking discovery about his family tree and withdraws from the firm. Can Mimi persuade Jamie to return as head of the family before all is lost or will a shocking secret tear Chatsworth's leading family apart? Meanwhile, Frank finds himself climbing the employment ladder as janitor of 'St Mimi's School', conveniently funding his new leisure activity - the Gastric Bandits, a prostitute double act with Sherrilee and Derrilee, who light up his life.

• Paul Abbott

• James McAvoy
• Clive Russell
• Anne-Marie Duff