Animated cartoon series that followed the hit movie. Peter Venkman, Winston Zeddemore, Egon Spengler, and Ray Stantz are still hunting ghosts, but now with the friendly assistance of Slimer, who is no longer out to slime the good guys. The mysterious Doctor McCatheter gives Louis Tully free samples of supernaturally tainted health chips. Egon accidentally gets caught in the Proton Beams along with a ghost. The results are horrifying, causing them to exchange aging processes. Egon begins regressing at an alarming rate and the Ghostbusters must reverse the process before he disappears into nothingness. Suddenly the fictional spirits of Sherlock Holmes, his associate Dr. Watson and the notorious Moriarty materialize in Manhattan. Moriarty absorbs evil from various modern-day sources, determined to transform into a real, corporal villain.