Courage The Cowardly: Dog - Season 2eps13

In "The Tower of Dr. Zalost" from Courage the Cowardly Dog , a deeply depressed scientist uses a walking tower to fire cannonballs that induce sadness, forcing Courage to intervene to save a lethargic town and a depressed Muriel. Ultimately, Courage finds that the professor is lonely, using his signature happy plums to cure Zalost’s despair, resulting in a cheerful resolution. You can watch the full episode on Max or read a detailed recap on the Fandom wiki .