We've got a two-parter AND a whodunit this week, as the town of Springfield tries to discover who's guilty in "Who Shot Mr. Burns?” - Parts 1 & 2 (season 6, episode 25 and season 7, episode 1). And when it's a villain like Mr. Burns, everyone has motive and everyone...and we do mean EVERYONE...is a suspect...

Oh, and would Mr. Burns get along with Yzma? Snuff Out the Light Song 

History Highlights:

https://countway.harvard.edu/news/origins-polygraph

https://en.wikipedia.org/wiki/Polygraph#