![The Big Bang Theory Season 8 Episode 22 The Big Bang Theory Season 8 Episode 22](https://cdn.vidsrc.me/poster/tt0898266.jpg)
The Big Bang Theory Season 8 Episode 22
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.
Serie: The Big Bang Theory
Episode Title: The Graduation Transmission
Air Date: 2015-04-23