Extreme Ghostbusters Ghostbusters is still having a moment all these years later — there's a new movie starring Paul Rudd coming out this Summer to prove it — which makes this an excellent time to revisit the short-lived cartoon spinoff. The series is notable for featuring an inclusive group of new Ghostbusters who solve different cases each week with a little help from Dr. Egon Spengler and Slimer, of course. Watch Extreme Ghostbusters on Hulu.