The Johnson family eagerly prepares for Lisa to give birth, but the arrival in the neighborhood of Dan's wayward brother, Robbie, throws them for a loop.
Lisa grapples with life as a stay-at-home mom; Dan tries to uncover the real reason for Robbie's return; Bradley's crooked past catches up with him.
Greg watches over Tanya and Ella in Bradley's absence. Lisa returns to work after maternity leave, and Dan takes on his brother as an apprentice.
The conflict between Lisa and Angie comes to a head, and Greg is forced to come clean to Tanya and Ella about the danger they might be in.
In pursuit of family harmony, Lisa throws a big dinner party for the Johnson clan; the truth about what Robbie has been doing for the past eight years is revealed; Tanya and Ella have their own reckoning with Bradley's lies.
Still devastated over the truth about Robbie, Pauline overcompensates by throwing herself into granny duties; Tanya and Greg appear to be growing close, which doesn't go unnoticed by a disapproving Dan.
Tanya and Ella throw a farewell party that turns dangerous, and the residents of Mount Pleasant must put aside their differences to try to save their loved ones.
Bored being out of work, Lisa drives Dan mad. A couples' dinner turns more intimate when Lisa and Bradley bail, leaving Dan and Tanya alone to get better acquainted.
Lisa's power trip angers business partner Fergus and pushes Dan closer to Tanya; Charlie and Pauline go in search of wedding venues; Greg gets more than he bargained for with a drug dealer.
Tanya and Dan spend time together when Bradley goes away for the weekend and Lisa flies to Spain; Fergus moves in with Denise; Greg gets in too deep working as a drug runner.
Dan acts weirdly around Lisa and her father, Barry, after they return from Spain, so she plans a cozy night in to reconnect with her husband, but it goes terribly wrong.
Lisa interrogates Dan about what exactly happened between him and Tanya. Fergus grows more jealous of Denise's modeling gig, which isn't going as well as he thinks.
Charlie's stag party goes splendidly, despite Dan's foul mood-until Pauline's hen party stops by as well, and Lisa clashes with Tanya.
It's Pauline and Charlie's wedding day, but Lisa and Dan are far from enjoying a state of marital harmony, which is further complicated when Lisa learns big news.
The neighborhood gathers at the Johnson's home to watch an important soccer match; Lisa is led astray by a new friend; Sian's teenage stepson Gary moves in.
The residents pull together when a tragedy strikes Mount Pleasant; Dan becomes jealous of Lisa's friendship with Kim; Shelley and Pauline form an unlikely friendship; Pauline is bowled over when a blast from her past returns.
Dan is pleased to see his dad again, but Pauline is far from happy; Jack isn't moving back into the cul-de-sac, but he lands a job in Lisa's office; Greg reforms.
A handsome new neighbor turns up in Mount Pleasant, sending Bianca into a bit of a spin; Barry and Sue find a new hobby, but it might drive a wedge between the two of them; Dan remains irritated by Lisa's blossoming friendship with Kim.
Sue gets fed up during a disastrous shopping excursion with Terry and Margaret; Greg bumps into Kim and isn't as keen as she is to repeat their one-night stand; Denise is contacted by Fergus' lawyers; Pauline and Charlie go on a date.
Lisa and Dan are excited about their trip to Spain; Pauline and Charlie reveal they're back together.
Kate returns and tries her best to convince Lisa that she's all better now; Dan and Chris' budding bromance puts Lisa's nose out of joint; Lisa's welcome home drinks for her parents get out of hand.
Denise finally lets Fergus see their son, Josh, then becomes terrified that the boy might have kidnapped when Fergus is late; Dan is horrified when Lisa invites Chris and Bianca over for a dinner party, and Kate shows up to help with the cooking.
It's Christmas Day in Mount Pleasant, but the residents are having trouble being jolly; Pauline wishes Charlie wasn't there; Lisa is unhappy with her present from Dan; disaster strikes at Bianca's.
Lisa is convinced that Dan will forget their anniversary, Shelley is cross with Greg for gambling, and Denise tries her hand at dating after dumping Fergus.
Lisa's self-esteem takes a serious hit when her smock top is mistaken for a baby bump. Kate is troubled by news that her husband's death is being investigated.
As Dan recovers from his hernia operation, an increasingly frazzled Lisa has to run around after him. decides to confront Greg about his gambling.
Bianca throws a hot-tub party for Jack's birthday, but tensions bubble over as much as the water does. Greg asks Dan to lend him some money, but it falls on deaf ears.
After their home is burgled, Lisa and Dan are devastated to discover their wedding photograph was taken; Shelley feels flattered by a recruiter who fancies her; Greg turns down Lisa's advances; Fergus shows his knack for playing loose with the truth.
Lisa tries but fails to keep up appearances as Barry and Sue prepare for their 40th anniversary; Kate reveals to Dan what she witnessed; Greg receives more bad news.
Lisa and Dan struggle to keep up the pretense that they're still together, and Shelley's had enough of Greg's lies. Dan has a moment of clarity.