The Big Bang Theory/The Separation Oscillation
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The Separation Oscillation is the second episode of the ninth season of The Big Bang Theory, and the one hundred eighty-fifth episode overall.
Starring: Johnny Galecki (Dr. Leonard Hofstadter), Jim Parsons (Dr. Sheldon Cooper), Kaley Cuoco-Sweeting (Penny Hofstadter), Simon Helberg (Howard Wolowitz), Kunal Nayyar (Dr. Rajesh "Raj" Koothrappali), Mayim Bialik (Dr. Amy Farrah Fowler), Melissa Rauch (Dr. Bernadette Rostenkowski-Wolowitz)
Guest Starring: Melissa Tang (Mandy)