The Mysterious Island Part 3 Chapter 4 - The Colonists on the Beach.

In which the settlers discover the sunken brig "Speedy," whose mysterious destruction both enriches their colony with valuable cargo and puzzles them with its inexplicable sinking, prompting investigations into the strange forces at work beneath the waters. The episode unfolds with a mixture of practical salvage efforts and philosophical debate on the cause, culminating in the surprising discovery of remnants of a torpedo, hinting at extraordinary peril beyond ordinary maritime hazards.