Guest Star: Katherine Von Till
The Graduation Transmission
Season 8, Episode 22 - Aired April 23, 2015
When Leonard is set to give the commencement address at his former high school, a canceled flight threatens to stop him giving the speech. Meanwhile, Howard's engineering skills are tested when he and Sheldon try fix Raj's toy helicopter, while Raj plays his parents against each other after his father cuts him off financially.
Appeared as Tech Support. v.o. recording