The 2019 action–sci-fi TV movie Megalodon, directed by James Thomas, delivers a tense encounter between modern military forces and an ancient predator. The story begins when a Russian submarine conducting covert operations collides with a mysterious object in the depths of the ocean. In the aftermath, a massive creature is unleashed: the megalodon, a prehistoric shark believed to have been extinct for millions of years.

Nearby, an American naval destroyer commanded by Admiral King (played by Michael Madsen) responds to the distress call. The crew, which includes Commander Lynch, Captain Ivanov, and Jameson, soon discovers that they are not dealing with an ordinary submarine crisis but with a gigantic, seemingly unstoppable apex predator. The megalodon emerges from the depths with terrifying force, attacking ships, devouring anything in its path, and threatening international conflict as both American and Russian forces struggle to contain the beast.
The film follows the desperate attempts of the crew to defend themselves and neutralize the threat. Using advanced weaponry, torpedoes, and tactical maneuvers, they face repeated failures against the shark’s immense size and resilience. Tension grows as alliances are tested, loyalties are questioned, and the line between survival and duty becomes increasingly blurred.
Ultimately, the confrontation builds to a high-stakes showdown at sea. While the narrative embraces familiar creature-feature tropes, it delivers suspense through the spectacle of a modern navy battling a colossal predator from Earth’s distant past.
Though a made-for-TV production with modest budget and effects, Megalodon (2019) combines elements of military thriller and monster movie, offering fans of shark films an over-the-top, action-driven experience that emphasizes teamwork, courage, and humanity’s fragile dominance over nature’s most fearsome creatures.