“The Medicine Show of the 25th Century” is set in the distant future and follows a troupe of technology-hybrid humanoids as they travel from town to town, hawking a cure-all elixir for solutions to the world’s toughest problems. Filled with raucous slapstick, whimsical beauty, and plenty of winks and nudges, “The Medicine Show of the 25th Century” is Off-Leash Area’s 35th original production.