Series 11 Episode 19
Leonard decides to run against Sheldon in the race to become president of the tenants' association. Bernadette urges Howard and Raj to track down the owner of a drone they find in the back garden.
Series 11 Episode 1
The Proposal Proposal: Amy gives Sheldon an answer to his proposal. Howard and Bernadette get unexpected news.
Series 11 Episode 1
Series 11 Episode 2
The Retraction Reaction: Leonard angers the university with an embarrassing interview. Amy and Bernadette bond.
Series 11 Episode 2
Series 11 Episode 3
The Relaxation Integration: As Sheldon stresses about picking a wedding date, Amy urges him to find his laid-back side
Series 11 Episode 3
Series 11 Episode 4
The Explosion Implosion: Howard and Sheldon bond when they drive into the desert to shoot off a model rocket
Series 11 Episode 4
Series 11 Episode 5
The Collaboration Contamination: Penny and Leonard learn new ways to manage Sheldon's behaviour from an unlikely source
Series 11 Episode 5
Series 11 Episode 6
The Proton Regeneration: Sheldon and Wil Wheaton compete to play Professor Proton when his TV series gets a reboot
Series 11 Episode 6
Series 11 Episode 7
The Geology Methodology: Sheldon and Bert collaborate on some research, although Sheldon feels embarrassed about it
Series 11 Episode 7
Series 11 Episode 8
The Tesla Recoil: Leonard and Howard learn that Sheldon went to work with the military behind their backs
Series 11 Episode 8
Series 11 Episode 9
The Bitcoin Entanglement: Sheldon seeks revenge when the guys cut him out of a potentially valuable investment
Series 11 Episode 9
Series 11 Episode 10
The Confidence Erosion: Sheldon and Amy try to eliminate stress from their wedding plans by applying mathematics
Series 11 Episode 10
Series 11 Episode 11
The Celebration Reverberation: Sheldon and Howard plan special birthday celebrations for Amy and Halley, respectively
Series 11 Episode 11
Series 11 Episode 12
The Matrimonial Metric: Sheldon and Amy test their friends to see who should be their best man and maid of honour
Series 11 Episode 12
Series 11 Episode 13
The Solo Oscillation: Sheldon needs some 'alone time' to work, so Amy and Leonard bond over science experiments
Series 11 Episode 13
Series 11 Episode 14
The Separation Triangulation: Raj gets into a domestic drama with his new date Nell and her estranged husband Oliver
Series 11 Episode 14
Series 11 Episode 15
The Novelization Correlation: Penny gets angry when she thinks the female protagonist in Leonard's novel is based on her
Series 11 Episode 15
Series 11 Episode 16
The Neonatal Nomenclature: When Bernadette can't go into labour, her friends employ different tactics to help
Series 11 Episode 16
Series 11 Episode 17
The Athenaeum Allocation: Leonard jumps through hoops to secure the perfect wedding venue for Sheldon and Amy
Series 11 Episode 17
Series 11 Episode 18
The Gates Excitation: The guys do their best to meet Bill Gates when his firm has dealings with Penny's company
Series 11 Episode 18
Series 11 Episode 19
The Tenant Disassociation: Leonard competes with Sheldon in the race to be president of the tenants' association
Series 11 Episode 19
Series 11 Episode 20
The Reclusive Potential: A brilliant scientist invites Sheldon to his isolated cabin. Amy doesn't like her hen do.
Series 11 Episode 20