The Garfield Show (2009)

S1E37 Extreme Housebreaking

Garfield finds himself signed up for Dr. Whipple's pet obedience class after Jon secretly records his mischievous antics. However, Garfield soon uncovers that Dr. Whipple is nothing more than a con artist, using the course as a front to launder his ill-gotten gains. In a twist of fate, Garfield manages to sneak a microphone backstage, capturing the doctor’s disdainful remarks about the audience's gullibility. This revelation ultimately leads to the doctor's downfall, exposing his fraudulent scheme to the public.