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- Sheriff Bronson Stone
- Mayor Janet Nettles
- Brad Chiles
- Judy Reeves
- Cassidy Williams
- Randy Warsaw (single appearance)
- Worker Number One (single appearance)
- Sunday Around Noonish (single appearance)
- Eeko (single appearance)
- Drummer (single appearance)(no lines)
- Art hipsters (single appearance)
- Rat (single appearance)(no lines)
- Miner 49er (mentioned)
- Ghost Clown (mentioned)
- Phantom Shadow (mentioned)
- Headless Specter (mentioned)
- Man-Crab (graffiti)
- Ghost of Dead Justice (graffiti)
- Ghost Girl (graffiti)
- Slime Mutant (graffiti)
- Clio (single appearance)
- Painter (single appearance)(no lines)
- Cow (single appearance)(no lines)
- Tween girl's mom (no lines)
- Baylor Hotner (mentioned)
- Albrecht Von Cartofokauf (only time mentioned)
- The Kaiser Würsts (single appearance)(picture)
- Fish (single appearance)(no lines)
- Mr. Baywosenthal (single appearance)(no lines)
- United States
- Atlantic Ocean (mentioned)
- Germany (flashback only)
- "Junk" exhibit
- "Dirt in a Cup" (mentioned)
- "Cow Eating Grass" (mentioned)
- "Giant Blue Penguin Marries the Statue of Liberty" (mentioned)
- "Giant Blue Penguin and Wife Return to France to Meet Her Parents" (mentioned)
- Velma's first pair of glasses (destroyed)
- Randy Warsaw's Artwerks
- Daphne's cellphone
- Sheriff Stone's art beret
- 1001 Bavarian Nights (picture)
- Velma's second pair of glasses
- Brewers' yeast
- Transistor radio
|Worker 1||Revenge on Randy Warsaw for not giving him any credit for his works.|
|Butch Firbanks operating Junk||To get revenge on Randy Warsaw for changing everything about himself.|
|Song||Credits||Performed by||Character performance by|
|"The Hunters"||Written by Andy Sturmer and Mitch Watson|| Grey DeLisle, 1st ver.|
Frank Welker, 2nd ver.
| Eeko, 1st ver.|
Scooby-Doo, 2nd ver.
- When Janet Nettles is telling the gang about Randy Warsaw's graffiti artwork, monsters from previous episodes including the Man-Crab from Revenge of the Man Crab, Ghost of Dead Justice from the episode of the same name, Ghost Girl from The Legend of Alice May, and Slime Mutant from Beware the Beast from Below, can be seen.
- This episode was aired in Latin America and Brazil on October 8, 2012.
- In this episode, it is learned that without her glasses, Velma has green eyes.
- Shaggy was once trapped in a mannequin factory for a month.
- Billy West voiced the original incarnation of Shaggy in the first DTV, Scooby-Doo on Zombie Island.
- The title spoofs Heart of Darkness, a famous novella by Joseph Conrad.
- Randy Warsaw is a spoof on Andy Warhol. Towards the end, Randy repeatedly says, "I don't get it." In the 1960s, the clichéd response to Warhol's art was "I don't get it."
- The graffiti was in the style of the famous artist Banksy.
Animation mistakes and/or technical glitches
- Just as Junk falls apart after capturing Clio, Velma can be seen with her glasses briefly on even though they were crushed by Randy.
Inconsistencies/continuity errors and/or goofs
- Velma having green eyes is actually a continuity error since she had removed her glasses in The Creeping Creatures, and they were regular black.
- In Warsaw's online file, Blackpool is spelt, "Black Pool."
- Junk is credited as "Junk Golem". Possibly meant as a description of the monster.
- Mayor Nettles is credited as "Mayor Nettle".
In other languages
|Italian||Colpo Della Polka||Shot of the Polka|
|Spanish (Latin America)||Arte Oscuro||Dark Art|
|Greek||Η Τέχνη του Σκότους!||The Art of Darkness!|
- Scooby-Doo! Mystery Incorporated: Season Two, Part 1 - Danger in the Deep DVD set released by Warner Home Video on November 13, 2012.
- Scooby-Doo! Mystery Incorporated: The Complete Season 2 DVD set released by Warner Home Video on October 7, 2014.
- Scooby-Doo! Mystères associés: L'intégrale de la saison 2 (Scooby-Doo! Mystery Incorporated: The entirety of season 2) DVD set released by Warner Home Video on September 10, 2013.
|Previous episode:||Series:||Next episode:|
|The Hodag of Horror|| Scooby-Doo! Mystery Incorporated|
|The Gathering Gloom|