Wednesday, April 15, 2026

See Strange Creatures in SEA MONSTERS: THE DEFINITIVE GUIDE

Sightings of ‘Caddy’ in Canada and ‘Nessie’ in Scotland continue to intrigue both skeptics and believers alike. Now scientists are on a quest to separate fact from fiction as they embark on a global search for the truth about mysterious monsters lurking in the deep. Premiering Monday, March 28 at 10 p.m. ET on Discovery, SEA MONSTERS: THE DEFINITIVE GUIDE explores the most (in)famous legends of the ocean using the latest scientific technology and deep sea submersibles. During the hour-long special, viewers join the world’s leading experts as they investigate the myths and the truths behind these extraordinary creatures.

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SEA MONSTERS: THE DEFINITIVE GUIDE studies unimaginable monsters in the inky depths of the ocean.

Highlights from SEA MONSTERS: THE DEFINITIVE GUIDE include:

Giant Squid or Kraken?

Dr. Kat Bolstad from Auckland University of Technology dissects a Giant Squid washed up on a New Zealand beach. This animal is big and fearsome but does it have the strength or brain to live up to the legend of the mighty Kraken, feared by ancient Vikings?

‘Nessie’ and ‘Caddy’

Using the latest stealthy hydrophone technology, scientists are baffled by a recording of a mysterious ‘low growl’ while scanning the depths of Loch Ness. Could this be ‘Nessie’, the famous and elusive monster? And closer to home, an eye-witness recounts her sighting of the legendary Cadborosaurus – more affectionately known as ‘Caddy’ the Canadian sea serpent – as it swam by her waterfront home in British Columbia.

Megalodon vs. Livyatan

Two real and terrifying prehistoric creatures are brought to life using spectacular CGI. The 60-foot Megalodon shark and predatory Livyatan whale duke it out under the sea. But which beast will triumph in this ultimate battle of strength?

What are Globsters?

Viewers are presented with the truth behind the astonishing and mysterious fleshy creatures known to wash up on beaches around the world.

In association with Discovery Canada, SEA MONSTERS: THE DEFINITIVE GUIDEis co-produced by Handel Productions (Montréal) and Arrow Media (U.K.). Alan Handel and André Barro are Executive Producers for Handel Productions. Tom Brisley and Nick Metcalfe are Executive Producers for Arrow Media. For Discovery, Bruce Glawson is Executive Producer. Ken MacDonald is Vice-President and General Manager, Discovery. Tracey Pearce is Senior Vice-President, Specialty and Pay, Bell Media.

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What's On?

What’s On? June 15 - 28:

SERIES PREMIERE
Countdown
Hell Motel
Inside
Ironheart
Long Bright River
Smoke
We Were Liars
The Veil
The Waterfront

SEASON PREMIERE
The Bear
The Buccaneers
The Chosen
The Gilded Age

SEASON FINALE
Adults
Leverage: Redemption
Scrublands
Sullivan's Crossing
The Walking Dead: Dead City

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