|Season 3, Episode 15|
|Airdate||February 25, 2006|
|Written by|| Anthony Del Broccolo|
|Directed by||Steve Hoefer|
The Demonator is the fifteenth episode of the third season of Drake & Josh. It aired on February 25, 2006.
Drake and Josh insist on riding a roller coaster called the Demonator on its opening day, but Megan reveals it was going to open the night before. Drake and Josh aren't allowed to go, as Walter wants them to watch over their great-grandfather, Papa Nichols, who is 81 years old and has had surgery that afternoon. Walter and Audrey are required to go to a TV awards banquet that evening. Craig and Eric come over to watch him while Drake, Josh and Megan go off to ride the Demonator.
At Mystic Mountain, Drake, Josh and Megan are bumped to the end of the line again after Josh had to use the bathroom, "jumped" the line upseting other people, then Drake and Josh get bumped back again as Josh got into a tussle with "Milford Mouse", the park's mascot.
Drake and Josh finally get to ride the Demonator and arrive home just in the nick of time. Audrey and Walter get home just after Drake and Josh hide their "Demonator" shirts. Walter wakes up Papa Nichols, who then punches Walter in the nose and runs shouting out "U.S.A.!"
- Vernon Roberts guest starred as Papa Nichols.
- People leaving the Mystic Mountain ride groggy, with messy hair and saying strange things and Megan and Audrey say complimentary things about Bruce Winchill, a weatherman on a competitor to Walter's TV station are running gags in this episode.
- This is the only appearance of Mystic Mountain.