The honeymoon is over — literally — and Sheldon and Amy settle into married life. The adjustment period is sweet and funny.
Wedding gifts pile up and the couple faces the challenge of thank-you notes. Sheldon's systematic approach meets social conventions.
The baby question comes up for Sheldon and Amy and the conversation is more complex than either expected.
An old childhood friend of Sheldon's is mentioned and the backstory reveals a rift that still stings. Amy helps him process it.
A scheduling conflict at the planetarium creates drama for Raj and Howard. Their friendship bends but doesn't break.
The gang dresses up in Halloween costumes that imitate each other. The impressions reveal how well — and how poorly — they know one another.
A grant competition puts Sheldon, Leonard, and Raj against each other. Professional stakes test personal bonds.
Sheldon and Amy navigate physical intimacy milestones and the honest conversation about expectations is refreshing.
Amy and Sheldon's research paper gets a negative citation and they track down the critic. The academic grudge match is intense.
A VCR message from the past gives someone a new perspective on their life choices. The emotional discovery hits the whole group.
A paintball game brings out the gang's competitive sides in full force. Alliances form and break in rapid succession.
Penny and Leonard discuss having kids and the conversation reveals deep feelings about family and legacy.
Other physicists confirm Sheldon and Amy's theory, bringing them closer to a Nobel Prize. The excitement is palpable.
A meteorite creates drama when it ends up in the wrong hands. The guys navigate the ethics of scientific ownership.
A sperm donation request creates an awkward situation for the group. The boundaries of friendship get tested.
A star-studded game night features celebrity guests in a memorable one-off adventure. The gang's nerd credentials get the ultimate test.
Amy presents at a conference and her rising profile puts pressure on her relationship with Sheldon. Professional jealousy is real.
Competing scientists try to steal Sheldon and Amy's Nobel spotlight. The academic rivals play dirty.
Amy struggles with feeling like she doesn't deserve success. Sheldon's pep talk is unexpectedly perfect.
A major decision about their future forces Sheldon and Amy to get on the same page. The stakes have never been higher.
Accusations of plagiarism threaten everything. The gang bands together to fight for Sheldon and Amy's reputation.
Leonard makes peace with his mother in a genuinely moving storyline. Penny reflects on what family means to her.
Everything changes as the Nobel Prize announcement draws near. Sheldon faces the possibility that the recognition he's always wanted might actually arrive.
The series finale. The Nobel Prize, the elevator finally works, and the gang gathers for one last dinner. Sheldon's acceptance speech says everything. What a ride.