The Big Bang Theory/The Birthday Synchronicity
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The Birthday Synchronicity is the eleventh episode of the tenth season of The Big Bang Theory, and the two hundred eighteenth episode overall.
Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco (Penny Hofstadter), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz), Kevin Sussman (Stuart Bloom)
Guest Starring: Vernee Watson (Althea)