[s7e18] The Mommy Observation -

: Sheldon eventually apologizes in his own way, deciding to "condemn her internally with an outward appearance of acceptance"—an approach his mother ironically calls "very Christian". The Pasadena Murder Mystery

: The gang agrees to meet for dinner in exactly 20 years. A flash-forward to Monday, March 13, 2034, reveals that only Stuart shows up for the reunion. Guest Stars Laurie Metcalf returns as Sheldon’s mother, Mary Cooper. Kevin Sussman appears as Stuart Bloom. [S7E18] The Mommy Observation

: Raj organizes a murder mystery dinner where Stuart unexpectedly "dies" as the first victim. : Sheldon eventually apologizes in his own way,