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With baby Thomas turning family life upside down, William begins to wonder whether Mary might be thinking about having another child. As Brendan celebrates his 18th birthday and Kate looks toward Oxford, William and Mary face challenges at work involving a difficult funeral and a couple determined to have their baby at home. Meanwhile, Molly receives devastating news about her health.
William and Mary meet Kate at Oxford, where Kate hopes to be accepted. Terence gets involved in gang graffiti. Molly grows fascinated with entering contests. Doris begins dating Eamon.
Billy and Eamon come to blows at William and Mary's dinner party. Mary and Doris attend to a difficult birth, while William sorts out a missing body with Nicholas’s ex, also a solicitor who has taken over Nicholas’s practice. The new father aggressively propositions Mary, while Nicholas’s ex does likewise with William.
William and Rick are asked to celebrate a biker's funeral by putting him on a high speed bike run. When Terence is viciously slashed by gang members, William and Reuben decide he should go to stay with Reuben until things calm down. Mary is furious and turns cold towards William.
Molly and Rick squabble over how to cope with her cancer battle. William arranges a service for a man lost at sea. Mary remains frosty towards William and begins to fantasize about a handsome client, a doctor, and her ex.
Jane threatens to leave the firm as she finds Arnold's relationship with Mrs Ball difficult to cope with. The twin brother of William’s latest client puts a fright into staff by showing up unexpectedly at McKinnon & Spalding. William hits on a plan to get Terence back … a new home in another neighborhood. Molly wins a prize contest. After a grueling course of cancer treatment, Molly is finally given the all clear, prompting her to spend her prize winnings on travel for the grandkids and a party. At the celebration, William and Mary flirt with another attempt at marriage, but ultimately decide they’re happy with their lives just the way they are.
