Series 12 Episode 4

When Sheldon won't tell anyone why he's never mentioned Tam, his childhood best friend, Leonard tries to find out. Penny and Bernadette invite Raj's fiancée Anu out for dinner to get to know her.

The Conjugal Configuration: Sheldon and Amy's honeymoon runs aground in New York. Raj starts a social media dispute.

First shown: Thu 18 Oct 2018 | 20 mins

Series 12 Episode 1

The Wedding Gift Wormhole: Sheldon and Amy try to figure out the function of a wedding gift from Leonard and Penny

First shown: Thu 25 Oct 2018 | 20 mins

Series 12 Episode 2

The Procreation Calculation: Howard and Bernadette's life gets complicated when Stuart brings his new girlfriend home

First shown: Thu 1 Nov 2018 | 20 mins

Series 12 Episode 3

The Tam Turbulence: Leonard tries to find out why Sheldon has never mentioned Tam, his childhood best friend

First shown: Thu 8 Nov 2018 | 18 mins

Series 12 Episode 4

The Planetarium Collision: Sheldon sabotages Amy's career. Howard is asked to co-host Raj's show at the planetarium.

First shown: Thu 15 Nov 2018 | 18 mins

Series 12 Episode 5

The Imitation Perturbation: Howard dresses up as Sheldon for Halloween, but Sheldon gets his own back later at a party

First shown: Thu 22 Nov 2018 | 18 mins

Series 12 Episode 6

The Grant Allocation Derivation: Leonard faces tough choices when he is made responsible for distributing extra grant money

First shown: Thu 29 Nov 2018 | 18 mins

Series 12 Episode 7

The Consummation Deviation: Sheldon attempts to befriend Amy's father, but ends up having to bond with her mother

First shown: Thu 6 Dec 2018 | 20 mins

Series 12 Episode 8

The Citation Negation: Bernadette asks Stuart's girlfriend Denise to teach her how to beat Howard at a video game

First shown: Thu 13 Dec 2018 | 19 mins

Series 12 Episode 9

The VCR Illumination: A VHS tape from Sheldon's past inspires him not to give up on his latest scientific theory

First shown: Thu 20 Dec 2018 | 20 mins

Series 12 Episode 10

The Paintball Scattering: Raj spots Anu talking to her ex-boyfriend. Penny and Leonard organise a paintball game.

First shown: Thu 21 Feb 2019 | 18 mins

Series 12 Episode 11

The Propagation Proposition: Penny's ex Zack and his wife ask Leonard for a favour. Raj tries to make up with Anu.

First shown: Thu 28 Feb 2019 | 19 mins

Series 12 Episode 12

The Confirmation Polarization: Sheldon and Amy's super-asymmetry theory is proved correct by two physicists from Chicago

First shown: Thu 7 Mar 2019 | 19 mins

Series 12 Episode 13

The Meteorite Manifestation: Sheldon is thrilled to help Howard and Bernadette navigate some bureaucratic paperwork

First shown: Thu 14 Mar 2019 | 19 mins

Series 12 Episode 14

The Donation Oscillation: Penny attempts to sabotage Leonard's efforts to help Zack and Marissa have a family

First shown: Thu 21 Mar 2019 | 20 mins

Series 12 Episode 15

The D & D Vortex: The gang find out Wil Wheaton's hosting a celebrity game of Dungeons & Dragons at his home

First shown: Thu 28 Mar 2019 | 19 mins

Series 12 Episode 16

The Conference Valuation: Penny and Bernadette go away to a sales convention, leaving Howard in charge of the kids

First shown: Thu 11 Apr 2019 | 19 mins

Series 12 Episode 17

The Laureate Accumulation: Sheldon and Amy ask some Nobel laureates to take their side against academic competitors

First shown: Thu 18 Apr 2019 | 21 mins

Series 12 Episode 18

The Inspiration Deprivation: Amy has a meltdown when she feels pressure over the possibility of winning a Nobel Prize

First shown: Thu 25 Apr 2019 | 19 mins

Series 12 Episode 19

The Decision Reverberation: Raj feels worried after publishing a paper that suggests he may have discovered alien life

First shown: Thu 2 May 2019 | 18 mins

Series 12 Episode 20

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