"Woo-Hoo Dunnit?" is the twenty-second and penultimate episode of the thirtieth season of the American animated television series The Simpsons, and the 661st episode overall. The episode was directed by Steven Dean Moore and written by Brian Kelley. It aired in the United States on Fox on May 5, 2019.
In this episode, the Simpson family is investigated to determine who stole Lisa's college fund. Will Forte, Jackie Mason, and Liev Schreiber guest starred. Filmmaker Ken Burns appeared as himself. The episode received positive reviews.
This was the final episode featuring Russi Taylor to be released in her lifetime, two months before her death in July 2019. It was the final episode to feature Jackie Mason as Rabbi Krustofsky before his death in July 2021.