The Big Bang Theory - Season 8 - Eps 22: The Graduation Transmission
Howard questions his engineering abilities when he and Sheldon can’t get a toy drone to fly. Meanwhile, a cancelled flight nearly prevents Leonard from giving the commencement address at his former high school, and Raj pits his parents against each other when his father cuts him off financially.
About The Big Bang Theory

Title: The Big Bang Theory
First Air Date: 2007-09-24
Last Air Date: 2019-05-16
Status: Ended
Rating: 7.909/10 (from 11565 votes)
Language: EN
Seasons: 13
Total Episodes: 279
Network: CBS
Genres: Comedy
Production Companies: Chuck Lorre Productions, Warner Bros. Television
Synopsis
Physicists Leonard and Sheldon find their nerd-centric social circle with pals Howard and Raj expanding when aspiring actress Penny moves in next door.
Cast

Johnny Galecki
Leonard Hofstadter

Jim Parsons
Sheldon Cooper

Kaley Cuoco
Penny

Simon Helberg
Howard Wolowitz

Kunal Nayyar
Rajesh Koothrappali

Melissa Rauch
Bernadette Rostenkowski

Mayim Bialik
Amy Farrah Fowler