The Simpsons S00 E81 The Past and the Furious

"Just a product of society that's lost its good manners."

Lisa travels back in time to 1923 and discovers that the Springfield Mini Moose, once key to the town’s ecosystem, were driven to extinction in 1925. Teaming up with young Monty Burns, Lisa works to save the moose, but her actions unintentionally shape his future as a ruthless tycoon.