Alex Trebek

Alex Trebek (1940-2020) is a Canadian-American television personality. He portrays a version of himself named Alex Lebeck in the season 5 episode "Arthur and the Big Riddle." The character reappears in "Elwood City Turns 100!" but does not speak. He died from cancer in November 2020.

Carrer
He has been the host of the syndicated game show ' since 1984; before that, he hosted other game shows, including ', ' (the 1976 adult game show, not the Nickelodeon children's game show), ', ', and '. Trebek has made appearances in numerous television series, usually portraying himself. He also appeared in an episode of The Magic School Bus and Sesame Street, which were both fellow PBS shows.

Trivia

 * He, like a lot of the actors in the series, is Canadian.