"Doug" was a cartoon that lasted for most of the 1990s, first on Nick, and then on Disney, who gave it a bit of a revamp. It wasn't side-splittingly funny, or edgy, or particularly creative, and it wasn't loaded with pop culture references for the adults, and has never really become one of those "cult" cartoons. But there was also nothing offensively bad about it, and I imagine that, as 90s stuff becomes as big as 80s stuff in a few years, there will eventually be a minor Doug revival. There are worse things that could be revived; "Doug" was always entertaining, in a not-too-challenging sort of way, and was occasionally very funny. I enjoyed watching it all through the 90s, though re-watching a few episodes lately didn't really do much for me. It hasn't aged as well as some of its "classic nick" contemporaries, like "Pete and Pete."
The Halloween episode is said to have been advertised as a regular Halloween special. It concerns Doug and his blue friend, Skeeter, going to Funky Town, the local amusement park, to ride Bloodstone Manor, a Haunted Mansion-type of attraction that is rumored to be so terrifying as to be dangerous. Rumor has it a couple of guys rode through once and all that came back was their shoes.
Doug, Skeeter and local no-goodnik Roger get stuck in the ride and Doug has to overcome his own fears to help Roger, escape. It's not a bad episode, but I would have frankly preferred just to have a detailed walkthrough of Bloodstone Manor, which looks like a really bitching ride.