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Jay and Claire help Manny and Luke with a school project - building capsules to best protect an egg in a two-storey drop

Lily utters her first expletive during her debut as a flower girl, and Claire goes head to head with Duane Bailey in a televised debate for the town council seat

Comedy clips showcasing amusing internet videos on the themes of food and animals

The chef helps the owner of a Mexican restaurant in southern California who previously ran a successful catering company, but has struggled to adapt her skills to a new business

A series of flashbacks charts Homer and Marge's rocky marriage, including the time they attended a glamorous party at a mansion that ended in a food fight

Lisa learns she is good at crossword puzzles and enters a city-wide contest, while her father opens a break-up service after discovering he has a flair for letting loved ones down

Sheldon and Penny end up spending time together when he is forced to take a holiday. Meanwhile, Bernadette seeks Stuart's help. Comedy, starring Johnny Galecki

The guys are unable to get tickets for Comic-Con, so Leonard, Howard and Raj buy fake passes from a stranger, but worry about getting caught with them

George Sr is frustrated when someone else gets credit for his football wins, while Sheldon considers dropping out of college to focus on building his database

Mary struggles to make new friends, while Mandy pushes Georgie to date another woman

The fourth dinner party marks the halfway point of the experiment, and while some couples are on track for a long and happy marriage, the week leaves others more divided than ever

Leonard is upset to learn Penny is dating someone, so his friends persuade him to ask another woman out. Guest starring Sara Gilbert

Sheldon is fired and explores new activities in a bid to find a purpose in life other than physics, but Leonard takes drastic action to restore him to his old self

Leonard fears he is wasting his time with Penny and ends up spending the night with Leslie, while Sheldon frets over a change to his routine. Starring Johnny Galecki

Mandy gets an exciting job opportunity, Sheldon worries that he falling behind and Georgie takes his daughter to work

The gambling room is broken into and Sheldon wants to study abroad, while Missy makes a new friend

Claire's plans for a family portrait do not go smoothly, and Cameron reveals his inner diva. Comedy, starring Julie Bowen and Eric Stonestreet

Claire finally gets Phil to agree to sell their old car, and Mitchell decides to build a large princess castle for Lily. Comedy, starring Julie Bowen

Homer proposes to Marge for the second time when he discovers their marriage licence is invalid, but the ceremony does not proceed without a hitch

Homer becomes a doting father when he discovers Santa's Little Helper knows Maggie better than he does, while Moe joins an online dating agency and meets an attractive woman

Sheldon is forced to keep a secret when Penny tells him what happened on her first date with Leonard. Comedy, starring Johnny Galecki, Kaley Cuoco and Jim Parsons

Leonard sees Penny with another man and decides to cut his losses by going back to fellow scientist Leslie Winkle - a move that upsets Sheldon

Penny becomes addicted to an online game based on the world of Conan the Barbarian and keeps pestering Sheldon for advice

Marge works as a church volunteer and restores Reverend Lovejoy's faith in his vocation, and Homer is baffled to discover his image printed on a box of Japanese washing powder

While visiting an exhibition on Ancient Rome, Marge argues with Homer about his lack of ambition and they wonder what he would have been like as a Roman

Homer is forced to drive Bart to a brat camp in another state, meaning he has to miss a trip to Las Vegas with Moe. While they are away, Marge manages to get herself arrested

Groundskeeper Willie is made homeless and forced to move in with the family, while Homer embarks on a campaign to save the company that manufactures his favourite blue trousers

Homer gets trapped in a cave during a nature walk, and while the others go for help, Lisa passes the time by telling him a long and very strange tale

A mild-mannered stepfather desperately tries to keep the respect of his wife's children when their biological father returns. Comedy, with Will Ferrell and Mark Wahlberg

Anna Richardson hosts a Pride special, celebrating all of the most memorable singletons from across the sexual spectrum

Sarah from Plymouth becomes the first ever returning picker having previously been on the show as David. Twenty year-old plumber Jamie from Swansea is looking for love

Legal secretary Anna is matched with male stripper Junior, while Cameron and Louise look like the perfect match - but they have both been hurt in love and have their defences up

Gordon Ramsay heads to Miami, Florida, to help a couple who bought a Danish restaurant eight years ago but started losing money rapidly

During a field trip to the Franklin Institute, Gregory is keen to spend time with Janine, but she's avoiding him, and Ava teaches the students about aliens

Mitchell throws Lily a party for her second birthday and invites his mother DeDe (Shelley Long) - who creates tension by bringing along Claire's former lover Robbie (Matt Dillon)

Beverly tries to help Adam navigate a painless path through puberty, but just as his voice is changing, he is cast in the lead role of the school musical

Barry accidentally records over one of Beverly's prized family videotapes, her treasured keepsake from his fifth birthday party, while Adam and Murray build a robot together

Calvin and Dave embark on their first road trip together to a classic car show, only to hit an unexpected roadblock that tests their friendship

Malcolm surprises Calvin and Tina when he brings home a new motorbike, while Dave and Gemma opt for a spontaneous trip to Las Vegas

Comedy clips showcasing amusing internet videos featuring sheep

Adam and his friends drink home-brewed beer at his birthday sleepover, and Murray tells Barry and Erica he will buy a new CD player for them if they write the greatest song ever

Beverly discovers Adam is failing in Spanish class, and immediately blames his teacher. However, when she arranges for him to receive extra tuition, her plan backfires