Dr. Demento (AKA Barret Eugene Hansen) is a disc jockey and ethnomusicologist who achieved fame and/or infamy with his long-running syndicated radio program which features strange and bizarre novelty tunes of every type and description. Along with reviving popular interest in performers such as Music/SpikeJones and Music/TomLehrer, he introduced Music/WeirdAlYankovic to the world, which is pretty much a lifetime achievement in itself. Other performers often associated with his show include Music/DaYoopers, Music/NapoleonXIV, and Music/TheGreatLukeSki.

The show continues to air weekly via the Internet, and can be found [[http://www.drdemento.com here]].

He is [[NoodleIncident reportedly]] one of [[WesternAnimation/TheSimpsons Bart Simpson's]] [[SitcomArchnemesis arch-enemies.]] Off the air, he has an extensive knowledge of music history, and has written articles, essays, and liner notes on a wide variety of music subjects.

!!Tropes associated with the good Doctor:

* AlliterativeName
* AntiChristmasSong: He usually devotes all of December to holiday music and these make up the majority of the playlists.
* {{Bowdlerise}}: Tends to SoundEffectBleep out naughty words on his broadcasts, including an epic version of Creator/GeorgeCarlin's [[SevenDirtyWords "seven dirty words"]] routine with a different effect for each word.
* TheCameo: Often turns up in Weird Al music-videos.
* ChristmasInJuly: An annual tradition on his show.
* FilkSong: He at least borders on this genre at times, calling it "Dementia".
* InnocentInnuendo
* {{Lobotomy}}: Topic of the song "I'd Rather Have a Bottle in Front of Me (Than a Frontal Lobotomy)." It's all in the title (which was originally a Music/TomWaits quote), but to recap: would you rather solve your problems with [[DrowningMySorrows alcohol]], or would you choose frontal lobotomy?
* MorallyAmbiguousDoctorate: Some of the songs he plays can probably cause brain damage.
* MorePopularSpinOff: How he got his start.
* NoHitWonder: Not Demento himself, but many of the bands he plays; DaYoopers are a prime example.
* RealSongThemeTune: The opening theme is "Pico and Sepulveda", originally recorded by Freddy Martin (under the name Felix Figueroa) in 1947, but eventually replaced with a newer version about Demento. The show closes with the 1928 song "Cheerio, Cherry Lips, Cheerio" by Scrappy Lambert.
* SigningOffCatchPhrase: "Stay demented!"