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April 22 is the 112th day of the year. Starting in 1970, Earth Day was celebrated on this day.
Mother Nature fell ill due to the state of the environment, and was taken to St. Terra Hospital for recovery. Emmett Brown arrived to show Doogie Howser and several other doctors, in great detail the condition of the world, as well as leaving information on how to help Mother Nature.
Behind the scenes
- 1990, Sunday: The Earth Day Special (which featured an appearance by Christopher Lloyd as Emmett Brown) aired on this day.