Daphne: Tom, Tub, are you going to be okay here alone?
Tom: Sure. Our dads once left us alone on a rift for two weeks.
Tub: We sucked on sea urchins for nurserymen. We got ocean skills!
Daphne: I think we just found out where the missionaries went.
Velma: Yeah, out for sea food.
Shaggy: Like, it's a shame they finish dinner.
Daphne: Shaggy, the food would be three hundred years old.
Scooby: Hmmm, let's check the cupboard.
Tom, Tub, and Scooby the seal are characters from the Hanna-Barbera series Moby Dick and Mighty Mightor. It should be noted that in the TV series Moby Dick was a real whale and not a submarine.
Professor Pericles says that he met Frau Abigail Gluck in the 1930's - this would mean he is at least 85 years old.
Dr. Paul Williams and Captain Michael Murphy are the main characters in the series, "Sealab 2020", but are not the fathers of Tom and Tub.
National Treasure: Book of Secrets
The scene where Cassidy stays behind in order to keep the valves opened long enough for Moby Dick to get out of the underwater base is quite similar to the scene where Mitch Wilkinson stays behind in order to let Ben Gates and the rest of his group exit the cave they are stuck in, in the 2007 film National Treasure: Book of Secrets, starring Nicolas Cage, Justin Bartha, Diane Kruger, Jon Voight, Harvey Keitel, Alicia Coppola, Ed Harris, Bruce Greenwood and Helen Mirren.
The robots disguised as Nazi World War II soldiers are modeled after the Helghast soldiers from the video game franchise Killzone.
20,000 Leagues Under the Sea
The scene where Moby Dick is attacked by a giant squid is an allusion to the 1954 film adaptation of Jules Verne's book,20,000 Leagues Under the Sea, staring Kirk Douglas, James Mason, Paul Lukas and Peter Lorre, particularly the scene where the Nautilus is attacked by a giant squid and in order to get rid of her, the crew decides to electrocute it.
Sky Captain and the World of Tomorrow
The episode's plot bears many similarities with the 2004 movie Sky Captain and the World of Tomorrow, staring Jude law, Gwyneth Paltrow, Angelina Jolie, Giovanni Ribisi, Laurence Olivier and Bai Ling.
The Twilight Zone
The episode's name is a parody to the anthology series The Twilight Zone, created by Rod Serling in 1959.