Dr. Trebek

Dr. Trebek is a character from Phineas and Ferb and is a minor antagonist featured in Knights of the Multiverse Season 1. He's a member of the evil organization L.O.S.R. and presents himself as somewhat of a game-show host.

Personality
Unlike his other associates, Trebek acts a typical game-show host, making himself appear jovial and friendly, in contrast to how dangerous and deadly his traps are.