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Sheldon is upset when he realizes Leonard is the center of their group of friends.
Sheldon is upset when he realizes Leonard is the center of their group of friends.
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The Big Bang Theory
S4, EP15 "The Benefactor Factor"A wealthy donor makes Leonard question what he is willing to do for science.
The Big Bang Theory
S4, EP16 "The Cohabitation Formulation"Wolowitz considers taking things with Bernadette to the next level; Leonard and Raj's sister rekindle their relationship.
The Big Bang Theory
S4, EP17 "The Toast Derivation"Sheldon is upset when he realizes Leonard is the center of their group of friends.
The Big Bang Theory
S4, EP18 "The Prestidigitation Approximation"Leonard has to choose between Penny and his new girlfriend, Priya; Howard's magic trick drives Sheldon crazy.
The Big Bang Theory
S11, EP6 "The Proton Regeneration"Sheldon auditions for the role of the new Professor Proton; Penny takes care of Halley when Bernadette and Wolowitz need bed rest.
The Big Bang Theory
S11, EP5 "The Collaboration Contamination"Sheldon and Koothrappali confide in Bernadette when they can't handle Amy and Wolowitz working together; Penny and Leonard learn a secret from an unlikely source about dealing with Sheldon.
The Big Bang Theory
S11, EP4 "The Explosion Implosion"Wolowitz and Sheldon bond over having disappointing fathers; Leonard is disturbed when his mother finds a new best friend in Penny.
The Big Bang Theory
S11, EP3 "The Relaxation Integration"As Sheldon stresses about picking a wedding date, Amy tries to convince him he has a more laid-back side; Koothrappali and Stuart compete to win the heart of Bernadette's new co-worker.
