Georgie and Fagenbacher go head to head when Fagenbacher tries to sabotage Georgie's attempt to honor his dad.

Ned slowly starts with his volunteer crew until Esmeralda forces an accelerated scramble for stories; Detrick and Travis, Mare and Barry, and Adam and Adelola form Woodward and Bernstein teams with limited results.

Charlie's relationship with Angie is jeopardised when he meets her son's fiancé and realises she is his ex. Things get worse when the ex tries to hook up with him again, ultimately causing his breakup with Angie.

Charlie discovers an ex has a child that looks remarkably like him.

Walden and Alan meet a birth mother who is considering them.

Walden decides to foster a six-year-old named Louis.

Alan breaks Walden's rules to appear cool for Louis.

The Hecks spend New Year's Day at the Orson Escape Room.

Frankie is elated when she wins a month of free maid service.

Brad agrees to coach Sue's no-cut a capella group.

Amy and Sheldon's relationship takes a surprising turn during a game of 'Dungeons & Dragons'. Lucy and Koothrappali have an awkward date.

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.

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.

Walden and Alan meet a birth mother who is considering them.

Walden decides to foster a six-year-old named Louis.

Alan breaks Walden's rules to appear cool for Louis.

The Hecks spend New Year's Day at the Orson Escape Room.

Frankie is elated when she wins a month of free maid service.

Brad agrees to coach Sue's no-cut a capella group.

Amy and Sheldon's relationship takes a surprising turn during a game of 'Dungeons & Dragons'. Lucy and Koothrappali have an awkward date.

When Leonard receives an exciting opportunity to work overseas, Penny and Sheldon are thrown for a loop.

With Leonard away, Sheldon and Penny spend quality time together sharing intimate secrets. Also, Wolowitz helps Raj get over his ex-girlfriend.

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.

Walden's attracted to a mom at the kids' gym.

Walden and Alan try to convince Louis that Santa's real.

Herb asks Alan if he can go on a date with Lyndsey.

Frankie's told her days of having kids are over.

The Hecks call a meeting to deal with their bickering.

A stubborn Mike goes to the dentist.

Leonard and Sheldon's friendship is tested; Wolowitz's relationship with his mom causes a threat to his masculinity.

When the entire gang competes in a scavenger hunt designed by Raj, it brings out the best - and worst - in everyone.

Beverly Hofstadter writes a psychology book about Leonard which Penny buys and reads. Sheldon wants to ruin something for Amy after she ruins an Indiana Jones movie for him and Raj and Stuart try online dating.

Ursula dumps Joey but doesn't plan to tell him, so Phoebe disguises herself as her twin to break the news. Rachel cajoles Monica into trading identities so she can use Monica's health insurance for a sprained ankle.

Rachel interviews for a job as an assistant buyer at Saks Fifth Avenue. She also sees another side of the usually docile Ross when the girls face the boys during a not-so-friendly game of poker.

The gang searches frantically for Marcel, who slipped out of the apartment while Rachel was baby-sitting him. Rachel, who doesn't know that Marcel is an illegal pet, ends up calling Animal Safety.

Rachel and Barry start dating again which is slightly awkward because he's now engaged to Mindy. Chandler goes nuts when a woman he likes won't return his calls. The friends discover someone is spying on them.

Jim advises a player on the Celtics to take one of his recent losses less personally, sparking a controversy that forces the Kearney clan to confront their spiritual beliefs.

Alan goes too far in effort to collect $38 he loaned to Charlie. Meanwhile, Evelyn arranges a job for Jake.

Alan, Jake and Charlie all decide to try new things. Alan is dating more than one woman, Charlie learns to cook and Jake experiments with beer.

Caroline tries to build herself a Murphy bed, the kind which folds into the wall, in Max's apartment. Meanwhile, the chemistry between Max and Johnny heats up.

Frankie's told her days of having kids are over.

The Hecks call a meeting to deal with their bickering.

Ursula dumps Joey but doesn't plan to tell him, so Phoebe disguises herself as her twin to break the news. Rachel cajoles Monica into trading identities so she can use Monica's health insurance for a sprained ankle.

Rachel interviews for a job as an assistant buyer at Saks Fifth Avenue. She also sees another side of the usually docile Ross when the girls face the boys during a not-so-friendly game of poker.

The gang searches frantically for Marcel, who slipped out of the apartment while Rachel was baby-sitting him. Rachel, who doesn't know that Marcel is an illegal pet, ends up calling Animal Safety.

Rachel and Barry start dating again which is slightly awkward because he's now engaged to Mindy. Chandler goes nuts when a woman he likes won't return his calls. The friends discover someone is spying on them.