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Dara Ó Briain launches a brand new series with the help of guests Rhys James, Hugh Dennis, Sara Pascoe, Scott Bennett, Laura Lexx and Ahir Shah.

Dara Ó Briain presents a round-up special featuring unseen material, out-takes and the best bits from the rest of the series.

Inspired by his hero, Albert Einstein, Sheldon tries his hand at the violin. Also, Mary and Meemaw secretly buy a pregnancy test.

Dr. Sandra Lee treats Taylore, a young woman with unsightly elf-like bumps on her ears. Jose never goes out because of the baseball-sized lump on his head.

Mic Drop Pop! Josh has a large knot on his head sustained from a car crash 18 years ago. Brittney is covered in mysterious bumps. TJ has a curious lump protruding from his side.

Weighing over 600-lbs, Kirsten is close to losing all her mobility. She must regain her health in order to be the best mother she can to care for her son.

A self-conscious bride and her straight talking mom prove quite the challenge for the team. Plus, will Jo and Al deliver for a bride with very high expectations.

Lacey is getting married to her childhood sweetheart but is terrified of walking down the aisle. Can Jo and Al help her to overcome her insecurities.

Bride-to-be Rachel plans to celebrate her sizeable assets with a bold, strapless wedding dress. Will Jo and Al be able to convince her that less is more.

Sue and Lexie try to move back into their apartment but find it's been sublet to a man who refuses to leave. Axl gets a job driving the school bus.

Frankie is excited when Axl invites her and Mike to meet and have dinner with girlfriend Lexie's rich parents, Tammy and Bennett.

Orson Murder Mystery. Frankie discovers that a woman died in the bathtub of the Heck house close to 50 years ago. Frankie and Brick become convinced that she was murdered.

Sheldon and Dr. Sturgis have a fight when Dr. Sturgis marks a question wrong on Sheldon's test. Mary takes over for Pastor Jeff when he's out sick.

Things spiral out of control when Sheldon boycotts his favourite bread company. Georgie consoles Veronica when she's dumped by her boyfriend.

Inspired by his hero, Albert Einstein, Sheldon tries his hand at the violin. Also, Mary and Meemaw secretly buy a pregnancy test.

Full of confidence following being named one of People's 30 to Watch Under 30, Raj hits on Penny and becomes impossibly arrogant.

An intervention is used to try to force Sheldon to overcome his fear of driving.

Sheldon and his friends are mystified when a younger undergraduate student is attracted to him.

When Sheldon bans Penny from the apartment, she decides to retaliate. Howard and Raj search for the America's Next Top Model house.

Sheldon wants to use an alternate version of rock-paper-scissors to help resolve conflicts. A girl Wolowitz has a major crush on falls for Leonard.

Sheldon is over-exuberant that Leonard finally has a girlfriend matching his high standards.

Leonard seeks Penny's counsel when his relationship with Stephanie takes. Sheldon's hypochondriac tendencies get the better of him.

Sheldon irks the gangs with his obsession with proper Christmas gift protocol. Leonard's crushed when Penny dates a colleague of his.

Brick joins the school orchestra in an attempt to find himself a new girlfriend. Mike asks Sue to help plan his 25th anniversary with Frankie.

After falling ill, Frankie's mum stays at the Heck house. A nervous Sue tells Sean they should set each other up with one of their friends.

The Hecks take a hectic road trip for Thanksgiving to Frankie's sister's house but soon run into barriers that could make them late to the feast.

Unhappy that school funds are going toward football rather than academics, Sheldon decides to run for class president.

Georgie is thrilled when Veronica stays at the Coopers' for a few days. Meanwhile, Meemaw and Dr. Sturgis celebrate their one-year anniversary.

The Coopers help a broken-hearted Pastor Jeff through a rough patch in his marriage. Meanwhile, Sheldon pressures church members for donations.

Penny's criticism of Wolowitz's romantic life pushes him into depression and AWOL for a fighting robot battle the guys are depending on him for.

Looking to get friendly with Barry Kripke to gain access to a piece of high-tech lab equipment, Sheldon develops a flowchart process to make friends.

When Sheldon loans money to Penny so she can pay her rent, it leads to Leonard coming face-to-face with her ex, Kurt.

A visit from Leonard's mother ends up bringing him and Penny closer.

Paintball leads to a squabble between Sheldon and Penny as well as romance between Howard and Leslie.

The gang is thrilled to see Summer Glau is also aboard their train to San Francisco. Sheldon frets over having forgotten a paper he wants to present.

Penny's business selling hair accessories out of her apartment gets out of hand when an over-caffeinated Sheldon takes charge.

Penny feels threatened when another sexy woman moves into the apartment building and angered when she senses the guys are being taken advantage of.

Dara Ó Briain presents a round-up special featuring unseen material, out-takes and the best bits from the rest of the series.

A box of old videotapes from 1988 reveals the terrifying origins of the evil haunting that plagues sisters Katie and Kristi.