: A subplot begins involving Howard being tracked down by Colonel Williams (Dean Norris) from the Air Force, who is interested in the quantum gyroscope he, Leonard, and Sheldon invented.
: Bernadette officiates a small outdoor ceremony while Amy plays the harp. In a rare emotional moment, Sheldon stands up to give a tribute to his two best friends, Leonard and Penny. Reception and Cast Notes [S10E1] The Conjugal Conjecture
: Much of the episode deals with the awkward aftermath of Leonard’s father, Alfred, and Sheldon’s mother, Mary, leaving dinner together the night before. Sheldon is particularly distressed, going as far as to ask Alfred if he "defiled" his mother. : A subplot begins involving Howard being tracked