Mia's return finds Charlie questioning how devoted he is to Chelsea. Meanwhile, Alan tries to write a screenplay and the guys rush a labouring Judith to the hospital.

Charlie must make a difficult decision about his future as to which woman he wants to spend his life with, Chelsea or Mia. Meanwhile, Charlie also grows wary that Melissa has slowly moved into the house.

Joyce drives Vince crazy with jealousy.

Mike crashes Carl's Valentine's Day plans.

Molly throws a surprise birthday party for Mike.

Part 2 of 2. Sophie goes into labour just before the Dessert Bar's grand opening and demands that Max and Caroline be present for the birth. Meanwhile, the girls run into problems when they don't secure a liquor license for their new venue.

Max and Caroline's plans to attract upscale clients to their dessert bar go awry when members of an arm-wrestling team become regulars. Meanwhile, Oleg ghost writes sexy messages for Max to send to Randy.

Oleg and Sophie's plan to have Max and Caroline as Barbara's godparents goes awry when Oleg's domineering mother arrives from the Ukraine for the baby's baptism and fires the girls from their godparent duties.

Sheldon winds up in traffic court when he gets a ticket because of Penny.

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

Monica plans a lovely, quiet Thanksgiving feast for the gang but the food burns when Chandler distracts the friends with a break-away balloon. Joey models for an embarrassing poster & Ross sings to his unborn child.

All the friends make a pact not to bring dates to the New Years party but they all do, except Ross who arrives with his new companion, a monkey named Marcel.

Chandler's romance novelist mum comes to visit and Joey catches her and Ross kissing. Monica and Phoebe compete for the attention of "coma guy", who gets hit by an ambulance after Monica woo-woo's at him on the street.

Everyone knows the sex of Ross' baby except for Ross, who doesn't want to find out until it's born. Monica makes a dozen lasagne for her aunt, only to discover that her aunt doesn't eat meat.

Joyce drives Vince crazy with jealousy.

Mike crashes Carl's Valentine's Day plans.

Molly throws a surprise birthday party for Mike.

Part 2 of 2. Sophie goes into labour just before the Dessert Bar's grand opening and demands that Max and Caroline be present for the birth. Meanwhile, the girls run into problems when they don't secure a liquor license for their new venue.

Max and Caroline's plans to attract upscale clients to their dessert bar go awry when members of an arm-wrestling team become regulars. Meanwhile, Oleg ghost writes sexy messages for Max to send to Randy.

Oleg and Sophie's plan to have Max and Caroline as Barbara's godparents goes awry when Oleg's domineering mother arrives from the Ukraine for the baby's baptism and fires the girls from their godparent duties.

Sheldon winds up in traffic court when he gets a ticket because of Penny.

When the guys find a ring from 'The Lord of the Rings' at a garage sale, it threatens to tear them apart.

Sheldon's friends come to his aid when his fear of public speaking stands between him and a coveted award.

Monica plans a lovely, quiet Thanksgiving feast for the gang but the food burns when Chandler distracts the friends with a break-away balloon. Joey models for an embarrassing poster & Ross sings to his unborn child.

All the friends make a pact not to bring dates to the New Years party but they all do, except Ross who arrives with his new companion, a monkey named Marcel.

Chandler's romance novelist mum comes to visit and Joey catches her and Ross kissing. Monica and Phoebe compete for the attention of "coma guy", who gets hit by an ambulance after Monica woo-woo's at him on the street.

Everyone knows the sex of Ross' baby except for Ross, who doesn't want to find out until it's born. Monica makes a dozen lasagne for her aunt, only to discover that her aunt doesn't eat meat.

Mike panics when Molly suggests they write their own vows.

Mike & Molly "dogsit" Jim, when Peggy goes out of town.

Molly's outspoken manner costs her a wedding chapel.

Max gives Caroline the college party experience she never had when they are invited to speak at Caroline's alma mater, the University of Pennsylvania, about their business. Meanwhile, Oleg's attempts to bond with baby Barbara are rebuffed by a possessive Sophie.

Earl is concerned he may not be able to keep up when his long-lost sweetheart, Pilar, visits from Cuba and wants him to take her sightseeing around the country. Meanwhile, Max must decide whether it's time to take her texting relationship with Randy to the next level.

The girls take a bartending class in order to add cocktails to their dessert bar menu, but Caroline is forced to take the class exam alone when Max gets chicken pox. Meanwhile, Sophie introduces a creepy lookalike video monitor doll to keep tabs on baby Barbara.

A fight between Leonard and Penny threatens their relationship, while Sheldon battles Wil Wheaton in bowling.

When Leonard and Penny aren't speaking, Sheldon goes to extremes to keep them both happy.

Leonard and Sheldon compete for the attention of a famous female physicist.

Chandler accidentally sees Rachel wandering around topless after her shower & a chain reaction of nudity ensues. Joey finds himself playing parent when he has to decide whether to hide his father's affair from his mum.

Ross' first date in nine years is on Valentine's Day. Joey sets Chandler up on a blind date with Janice. Phoebe, Monica & Rachel decide to spend the holiday burning mementos of past boyfriends & end up causing a fire.

Monica cooks a gourmet meal for a restaurateur looking for a new chef. Chandler gets promoted, quits & then takes his job back. Ross has a date with a colleague and gives new meaning to the term "spanking the monkey".

Joey falls for Phoebe's twin sister, Ursula. Chandler finds himself between a rock and a hard place when he's told to fire an employee he's attracted to. Ross has doubts about parenthood when he attends Lamaze classes.

After a shocking discovery in the Beaucroft crypt, Gabe fakes his exit from Beaucroft Hall, determined to spy from a distance and uncover the truth.

Pete finds himself obsessing over a photograph of himself online that an apparent internet troll has been posting. Pete ends up on a dark path as he tries to hunt down the anonymous troll, leading his mother Amy to try to protect him from himself.

Girls rule the roost after Charlie consents to Chelsea's desire for Alan's girlfriend, Melissa, to move in with them.

Alan cares for Judith's child and his ex-mother-in-law. Elsewhere, Charlie backing over a cat provides Jake with a chance to blackmail him.

Johnny struggles to find a new purpose while Moira must confront the harsh realities of local politics.

Max gives Caroline the college party experience she never had when they are invited to speak at Caroline's alma mater, the University of Pennsylvania, about their business. Meanwhile, Oleg's attempts to bond with baby Barbara are rebuffed by a possessive Sophie.

Earl is concerned he may not be able to keep up when his long-lost sweetheart, Pilar, visits from Cuba and wants him to take her sightseeing around the country. Meanwhile, Max must decide whether it's time to take her texting relationship with Randy to the next level.

The girls take a bartending class in order to add cocktails to their dessert bar menu, but Caroline is forced to take the class exam alone when Max gets chicken pox. Meanwhile, Sophie introduces a creepy lookalike video monitor doll to keep tabs on baby Barbara.

Chandler accidentally sees Rachel wandering around topless after her shower & a chain reaction of nudity ensues. Joey finds himself playing parent when he has to decide whether to hide his father's affair from his mum.

Ross' first date in nine years is on Valentine's Day. Joey sets Chandler up on a blind date with Janice. Phoebe, Monica & Rachel decide to spend the holiday burning mementos of past boyfriends & end up causing a fire.

Monica cooks a gourmet meal for a restaurateur looking for a new chef. Chandler gets promoted, quits & then takes his job back. Ross has a date with a colleague and gives new meaning to the term "spanking the monkey".

Joey falls for Phoebe's twin sister, Ursula. Chandler finds himself between a rock and a hard place when he's told to fire an employee he's attracted to. Ross has doubts about parenthood when he attends Lamaze classes.

Girls rule the roost after Charlie consents to Chelsea's desire for Alan's girlfriend, Melissa, to move in with them.

Alan cares for Judith's child and his ex-mother-in-law. Elsewhere, Charlie backing over a cat provides Jake with a chance to blackmail him.