Episode Guide

The Big Bang Theory has now finished its twelve-season run on CBS. The hour-long series finale aired Thursday, May 16, 2019.

On August 22, 2018, CBS and Warner Bros. announced that The Big Bang Theory would be ending with its twelfth season. The twelfth season premiered with a special broadcast on Monday, September 24, 2018 and moved back to its regular Thursday night time period on September 27.

Trending Episodes

• 308. The Adhesive Duck Deficiency
• 101. Pilot
• 211. The Bath Item Gift Hypothesis
• 1224. The Stockholm Syndrome
• 1124. The Bow Tie Asymmetry
• 1206. The Imitation Perturbation

Popular Episodes

• 308. The Adhesive Duck Deficiency 4.83 / 5 
• 814. The Troll Manifestation 4.81 / 5 
• 507. The Good Guy Fluctuation 4.81 / 5 
• 314. The Einstein Approximation 4.77 / 5 
• 419. The Zarnecki Incursion 4.75 / 5 
• 715. The Locomotive Manipulation 4.75 / 5 

Episode Lists

• Howard & Bernadette: Key Episodes

  The key moments from Howard and Bernadette's relationship including their first date, Howard's proposal, their wedding, and the births of their two children.
• Leonard & Penny: Key Episodes

  The key moments in Leonard and Penny's relationship including the first time they saw each other across the hall, their first kiss, their first date, breaking up and getting back together, the first time Penny says "I love you", a couple of proposals, their engagement, two wedding ceremonies, and finally Penny getting pregnant.
• Sheldon & Amy: Key Episodes

  The key moments in Sheldon & Amy's relationship including Howard & Raj setting them up, the signing of the relationship agreement, the first time they said "I love you", them breaking up and subsequently getting back together, the proposal, the wedding and winning the Nobel Prize together.
• Christmas Episodes

  Celebrate Christmas with Sheldon, Leonard, Penny, Howard, Raj, Amy and Bernadette in these classic Christmas episodes of The Big Bang Theory.