- This article is about the original animated incarnation. For the live-action incarnation based on this one, see C.L. Magnus (Scooby-Doo 2: Monsters Unleashed).
C.L. Magnus is a middle-age Caucasian male with brown hair. He wears black shoes, grey dress pants, a white dress shirt, and a light brown tie. At home, he wears a light brown dinner jacket with dark brown cuffs and lapels.
Magnus was a dishonest businessman who had no qualms about defrauding his own company for his personal gain.
Scooby-Doo, Where Are You!
After hearing about the disappearances of his cargo, the gang went to his penthouse apartment to offer their assistance and learn about the incidents. Magnus told them that it was Redbeard's Ghost returning to pillage the high seas.
He teamed up with Cuthbert Crawls, Mama Mione, and Lila to get revenge on Mystery Inc. After their capture, Magnus revealed the plans the villains had for the gang after learning of Velma Dinkley's family secret. He was then shocked to hear from Velma that he and his allies could have made a fortune from selling the gas to the castle, instead of taking revenge. He was left grumbling at not noticing.
- In the Harvey Birdman, Attorney at Law episode Shaggy Busted, he was depicted as still in his costume while in prison.
- He also appears as one of the three suspects of being Redbeard's Ghost in level 4 of the DS/PSP video game Scooby-Doo! Who's Watching Who?