Doug (1991)

Season 3: Episode 17

Some tough high schoolers offer to sell Doug the very rare first issue of Man-O-Steel Man comic book, the issue he is missing. That same issue turns out to be missing from Sully's comic book store, and Doug feels guilty that he owns the only copy around. But when Mr. Sully only lets one customer into his shop at a time for security reasons, Doug decides what is right for everyone.