Australia has now aired the remainder of the Guess Who episodes, and thanks to Gatherer Hade, we know a bit more information about them. Captain Cutler, Charlie the Robot, Redbeard, and the Creeper will be the "classic" villains in "A Haunt of a Thousand Voices!" In addition, the title for the series finale was apparently sent to TV providers incorrectly (which wouldn't be the first time...other examples include "The Fastest Fast Food Fiend," "Sorcerer Snack Scare," "Escape from Mystery Island," etc.). The title is apparently "The Movieland Monsters!" according to the title card, not "The TV and Movieland Monsters!" as previously reported by numerous TV guide sites. The episode will be very reminiscent of "E-Scream" from What's New, Scooby-Doo? and will have a Hologram Monster as the villain. The movies that the gang go inside of in the episode are The Searchers, Casablanca, A Night at the Opera and The Wizard of Oz (two of which have been already sort of done in The Richie Rich / Scooby-Doo Hour).I'd like to give another huge thanks to Gatherer Hade for sharing this info with us! Images BELOW:

It is mainly only this one because we already have the Alien picture.