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A robot disguised as a Nazi World War II soldier attacks Cassidy Williams at her radio station, eventually self-destructing as Cassidy fights back, taking the entire building with it. She explains to the gang that these robots have been attacking her for the past week. Robots continue to attack the gang as they investigate. When the gang realizes that the robots are coming from deep underwater, Daphne recruits two of her babysitting charges, Tom and Tub, and their seal (also named Scooby), to transport the gang in their submarine to the robots' spawning vats, in an area the kids call "The Midnight Zone". Shortly after submerging, the sub is attacked by a group of robots and damaged, and the gang stumble upon an underwater base and attempt to use it to repair the sub, only to discover that the base is the factory where the robots are constructed, run by Professor Pericles. In the end, Pericles escapes leaving the laboratory to self-destruct, possibly killing Cassidy Williams as the gang, Tom and Tub, and Scooby the Seal escape.
Cast and characters
- Kriegstaffebots (operated by Professor Pericles)
|Professor Pericles controlling the Kriegstaffebots||To kill Cassidy Williams and get the last piece of the Planispheric Disk.|
- Professor Pericles says that he met Abigail Gluck in the 1930's - this would mean he is at least 85 years old. Some types of parrots can live over 100 years.
- This episode was aired in Latin America on November 10, 2012.
- Tom, Tub, and Scooby the seal are from Moby Dick and Mighty Mightor, except that in the TV series Moby Dick was a real whale.
- Tom and Tub's fathers are Dr. Paul Williams and Captain Michael Murphy from Sealab 2020, another Hanna-Barbara show.
- Turning around a chair in which a villain sits, only to find a corpse, echoes the movie Psycho.
- This episode was included in Cartoon Network's Scooby-Doo! Back to School Marathon (August 10-11, 2013).
Animation mistakes and/or technical glitches
- When Velma picks up the Benevolent Lodge of Mystery photo, her swim suit sleeves are colored like Daphne's.
- Then again, it could have been Daphne who picked up the photo.
- A second later, Fred's arm is hidden behind Velma's head. His hand looks like the sleeve does not reach it.
In other languages
|Italian||La Città Sommersa||The Submerged City|
|Spanish (Latin America)||Dimensión Desconocida||Unknow Dimension|
|Hungarian||Az éjfekete zóna||The Midnight Zone|
|Greek||Η Ζώνη του Μεσονυκτίου||The Midnight Zone|
- Scooby-Doo! Mystery Incorporated: Season Two, Part 1 - Danger in the Deep DVD set released November 13, 2012.
- Scooby-Doo! Mystery Incorporated: The Complete Season 2 DVD set released October 7, 2014.