The Perfect Birthday - THE BIG BANG THEORY™
THE BIG BANG THEORY and all related characters and elements © & ™ Warner Bros. Entertainment Inc (s17)

The Perfect Birthday - THE BIG BANG THEORY™ Ecard

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"Optimal Birthday Model Analysis" - Sheldon, Penny and the gang discuss the particulars of Sheldon's birthday celebration. [Message] Your day. Your way. Happy Birthday