A Research Study and Czechoslovakian Wedding Pastries
When Dr. Sturgis recommends Sheldon and Missy for a university research study on twins, Mary is unhappy when the test results go to Sheldon's head.

Cast
Iain ArmitageSheldon Cooper
Zoe PerryMary Cooper
Lance BarberGeorge Cooper
Montana JordanGeorgie Cooper
Raegan RevordMissy Cooper
Annie PottsConnie Tucker
Emily OsmentMandy McAllister
Jim ParsonsSheldon Cooper (voice)Young Sheldon on tvt

