Sheldon tries to intervene when he discovers a secret about Penny and Leonard on The Big Bang Theory. "The Decoupling Fluctuation" is the second episode of the show's sixth season.

Leonard and Sheldon are all dressed up for Howard and Bernadette's wedding on The Big Bang Theory. "The Countdown Reflection" is the 24th episode and season finale of the show's 5th season.

Sheldon works here with Amy in the lab. This is his version of a vacation.

Sheldon is a nice guy. But he can also be a very demanding friend toward Leonard, as evidenced here.

Sheldon busts a move on TBBT. Instant fun ensues.