It concerns two male Caltech prodigies in their twenties, one an experimental physicist (Leonard) and the other a theoretical physicist (Sheldon), who live across the hall from an attractive blonde waitress with show-biz aspirations (Penny).
The Big Bang Theory - S08E16 - The Intimacy Acceleration(High MP4)(Aired: 5 October 2015) Sheldon and Penny agree to participate in an unusual experiment. Leonard, Amy, Raj and Emily spend the evening trying to escape a room with a "zombie". Howard and Bernadette run into trouble at the airport after returning from Mrs. Wolowitz's funeral.
The Big Bang Theory - S08E22 - The Graduation Transmission(High MP4)(Aired: 16 November 2015) Howard questions his engineering abilities when he and Sheldon can't get a toy drone to fly. A cancelled flight nearly prevents Leonard from giving the commencement address at his former high school. Raj pits his parents against each other when his father cuts him off financially.