|Unit Director(s)||Peter Hudecki|
|Storyboard Artist(s)||Francois Hemmen|
|Orig. airdate||30 October 1991|
Changes from the Book
The changes in this episode are made solely for time purposes, such as the only consequence of the press exposure is the meeting with Professor Calculus. In addition, Tintin has a smooth voyage in the Shark-proof submarine as opposed to the book where Tintin is in peril when the vehicle is snarled with seaweed. Furthermore, the treasure hunters never return to the island to dig around a large wooden cross because of a mistaken idea of where the treasure could be located, since Tintin comes to realize why that would be useless while returning from the island from the story's only landing.
Calculus during his first meeting with Tintin and Haddock did not mention to both that he's a little hard of hearing which he later mentioned in "Destination Moon" when he uses an ear trumpet. In addition, Capt. Haddock does not write a message on a wall to tell Calculus that they are not interested in his invention, the Captain simply marks an "X" on the crate containing the submarine assembly to account for why Calculus stows away anyway and for the animators to avoid having to make multiple written translations for each language used. In addition, Tintin is the only one who does the diving and it is he who finds the cache of Jamaican Rum and Captain Haddock takes the discovery calmly.
- Colin O'Meara - Tintin
- Susan Roman - Snowy
- David Fox - Captain Haddock, Sir Francis Haddock
- Wayne Robson - Professor Calculus
- John Stocker - Detective Thompson
- Dan Hennessey - Detective Thomson