In the midst of her new obsession with couponing, Caroline discovers the secret ingredient to Max's cupcakes.

Lee realises his past has finally caught up with him and takes drastic action. Kirsty and Glen practice their wedding dance before Kirsty finally comes clean about her shoplifting habit.

While celebrating Glen’s promotion, Glen and Kirsty check their bank account to discover their wedding fund is empty. With Lee on the run, Glen finally comes face to face with the bad men his brother has been running from, but all is not as it seems.

Chelsea's illness gives Charlie a chance to prove he can take care of her whilst also yearning to run away from the situation.

Chelsea's discovery of naked pictures of another woman on Charlie's iPhone leads to his swapping stories of sexual experiences during a drunken night with Alan, Herb and Jerome.

Charlie and Alan find Frankie, a sexy but seemingly crazy woman, hitting a car with a baseball bat. Charlie brings Frankie back to his Malibu home but the two brothers, both competing for her attention, are taken aback by a secret that she's been hiding.

Frankie explains why she's in hiding with her 8-year-old daughter, Joanie. Both of the men are romantically interested in Frankie, and she reciprocates with one of the brothers. And Joanie likes Jake, who is completely disinterested in her.

Alan offends Charlie by choosing their crazy cousins as Jake's guardians. Later, as Charlie and Jake play basketball, Jake falls, hitting his head. Charlie rushes him to the emergency room and finds that his charm with women doesn't work with the admitting nurse.

Mike’s brother Rusty gives Sue an extravagant gift.

Mike is offered a position as Regional Manager of the quarry.

Howard takes a class that Sheldon's teaching.

Howard is invited by NASA to throw the first pitch at a game.

Penny wonders why Raj's girlfriend doesn't like her.

Ross reveals his sexual fantasy to Rachel which involves a certain Star Wars character. Monica suffers from insomnia after her breakup with Richard and Chandler, back together with Janice, wants Joey to bond with her.

Ross is in a hurry to get everyone dressed for an important banquet at the museum but everyone keeps delaying. Monica freaks when she hears an answer phone message from Richard and Joey & Chandler fight over a chair.

Phoebe dates a man who thinks he's stalking her twin sister. Ross and Rachel give Chandler "boyfriend" lessons. Monica uses her free time to make jam and considers artificial insemination through a sperm bank.

Phoebe acts as Joey's agent and has some success in getting him auditions. Ross is upset to see Ben with a Barbie doll and Chandler is advancing in his relationship with Janice but realises he has commitment fears.

Charlie and Alan find Frankie, a sexy but seemingly crazy woman, hitting a car with a baseball bat. Charlie brings Frankie back to his Malibu home but the two brothers, both competing for her attention, are taken aback by a secret that she's been hiding.

Frankie explains why she's in hiding with her 8-year-old daughter, Joanie. Both of the men are romantically interested in Frankie, and she reciprocates with one of the brothers. And Joanie likes Jake, who is completely disinterested in her.

Alan offends Charlie by choosing their crazy cousins as Jake's guardians. Later, as Charlie and Jake play basketball, Jake falls, hitting his head. Charlie rushes him to the emergency room and finds that his charm with women doesn't work with the admitting nurse.

Mike’s brother Rusty gives Sue an extravagant gift.

Axl & Hutch take a road trip to Ohio for Kenny's wedding.

Mike is offered a position as Regional Manager of the quarry.

Howard takes a class that Sheldon's teaching.

Howard is invited by NASA to throw the first pitch at a game.

Penny wonders why Raj's girlfriend doesn't like her.

Ross reveals his sexual fantasy to Rachel which involves a certain Star Wars character. Monica suffers from insomnia after her breakup with Richard and Chandler, back together with Janice, wants Joey to bond with her.

Ross is in a hurry to get everyone dressed for an important banquet at the museum but everyone keeps delaying. Monica freaks when she hears an answer phone message from Richard and Joey & Chandler fight over a chair.

Phoebe dates a man who thinks he's stalking her twin sister. Ross and Rachel give Chandler "boyfriend" lessons. Monica uses her free time to make jam and considers artificial insemination through a sperm bank.

Phoebe acts as Joey's agent and has some success in getting him auditions. Ross is upset to see Ben with a Barbie doll and Chandler is advancing in his relationship with Janice but realises he has commitment fears.

Charlie agrees to meet with a former girlfriend who ended their relationship years earlier, leaving Charlie devastated. But Charlie's in for a huge surprise when he discovers that she is now a he, and he, Bill, wants to be Charlie's friend.

Judith's sinister-but-sexy sister, Liz, plans to attend Jake's 11th birthday party. Alan asks Charlie to behave. But when Liz arrives, she ignores Charlie and flirts with Alan instead. Liz proceeds to cause a commotion between her sister and her ex-brother-in-law.

Jake becomes a brooding musician when he continuously plays "Smoke on the Water" on his guitar with an ever-present grumpy attitude. Finally, Judith convinces Alan that Jake needs professional assistance, and they enlist the help of Dr. Linda Freeman.

The Hecks wage a war against the Glossners.

Sue works up the courage to tell Sean her feelings for him.

Frankie swears there’s something flying through the house.

The guys unsuccessfully try to invent "the next big thing".

Sheldon and Raj venture underground in the name of science.

Penny's flirtatious sales techniques work a little too well.

Phoebe's half-brother visits, but they have trouble bonding. Joey attempts to build an entertainment centre whilst Ross is challenged to name the five celebrities he'd like to sleep with the most.

When Janice asks the gang if any of them have ever slept together, the friends flash back to a time three years before, where some dark secrets are revealed.

Joey sees Janice and her soon-to-be-ex-husband, "The Mattress King", kissing. Rachel attempts to have her father and Ross bond but things don't go as planned and Joey gets a job teaching a soap opera acting class.

Joey tells Chandler he saw Janice kissing her ex-husband. Monica accidentally bumps Ben's head against a post and Phoebe is convinced she's cursed because every time she goes to the dentist someone around her dies.

Allison and Deacon are desperate for a baby, but they've run out of money to fund any more IVF treatment. So they decide to 'borrow' the £50,000 they need from their rich boss Alfie, who they discover is illegally creaming off money from the company.

Allison starts IVF and pressure mounts to turn the stolen bitcoin into usable money, so Deacon asks his creepy uncle to help launder it. Meanwhile, HMRC launches an investigation.

Charlie's desperate to make sure Chelsea and Evelyn don't befriend each other following their first meeting.

Alan lets Chelsea fix him up on a blind date with one of her friends, Rose.

Max and Caroline are suspicious of the new upstairs neighbour, Sophie, who moves in after the old tenant dies.