Insert details here.
- Jacobi Sparochi (only appearance; dies)(also flashback)
- Professor Eric (only appearance; dies)
- Professor Francois (only appearance; dies)
- Frederico (single appearance)(also flashback)
- Diver (single appearance)(no lines)(flashback)
- Quest wristwatch
- Dr. Quest's laptop
- Black pearl
- Scientists' equipment
- Dragonfly (seen on Quest Map)
|Quinton Flynn||Jonny Quest|
|Rob Paulsen||Hadji Singh|
Frederico as tentacled monster
|John de Lancie||Dr. Benton Quest|
|Robert Foxworth||Race Bannon|
|Clancy Brown||Professor Francois|
Frederico as the entity on the wall
|Michael Gough||Jacobi Sparochi|
- Bandit and Jessie are absent.
- Although this airs as the last episode, it is chronologically not the last, with previous episode having been written as the proper series finale.
- This episode marks the end of Questworld in the franchise.
- For one line in this episode, there is an accidental mix up from the voice actors, as Professor Francois speaks through Professor Eric's voice when he says the line, "Oh, we would be most honored."
- Upon being grabbed by the tentacle monster for the first time, Dr. Quest is being held by Race with his left arm in the first frame, but in the next frame is seen being held slightly off screen by Race's right arm.
- The French scientists were grabbed by the tentacles of Frederico, but when Jonny is flung into the door by the third tentacle which attempted to pull him into the death room as well, the final frame shows that the tentacles which had previously ensnared Francois and Eric had disappeared.
- Before the French scientists were sealed in the death trap, the entity causes the door to open outward and the handle being featured on the left from the outside before being open, but upon the desperate attempts of Francois and Eric escaping this room, the inside features the door handle on the wrong side by being on the left side also on the inside when it was closed... And then from the outside view the handle is back on the left side when the unfortunate fate happens and Race opens the door also.
- The Real Adventures of Jonny Quest: The Complete Second Season DVD set released on November 10, 2015 by Warner Archive Collection.
Sporachi: Beware the house. It is cursed, it holds a deep hunger.
Hadji: I feel that this wall. It hides something yet reveals it. Something evil.
Frederico: Resistance is futile.