Guest Star: Dr. George F. Smoot

• 

  The Laureate Accumulation
  Season 12, Episode 18 - Aired April 4, 2019

  After their Nobel prize competitors, Drs. Pemberton and Campbell, go on a publicity tour, Sheldon and Amy seek support from a trio of Nobel laureates: Kip Thorne, George Smoot and Frances Arnold. Meanwhile, Bernadette has the idea of turning Howard's time as an astronaut into a children's book.

  Appeared as Himself