• S1.E1 ∙ Piranha
• S1.E2 ∙ Killer Catfish
• S1.E3 ∙ Alligator Gar
• S1.E4 ∙ European Maneater
• S1.E5 ∙ Amazon Assassins
• S1.E6 ∙ Amazon Flesh Eaters
• S1.E7 ∙ Freshwater Shark

• S2.E1 ∙ Demon Fish
• S2.E2 ∙ Death Ray
• S2.E3 ∙ Killer Snakehead
• S2.E4 ∙ Congo Killer
• S2.E5 ∙ Alaskan Horror
• S2.E6 ∙ Rift Valley Killers
• S2.E7 ∙ Hidden Predator
• S2.E8 ∙ Special: Killer Catfish (Extended Cut)

• S3.E1 ∙ The Mutilator
• S3.E2 ∙ Flesh Ripper
• S3.E3 ∙ Silent Assassin
• S3.E4 ∙ Chainsaw Predator
• S3.E5 ∙ Electric Executioner
• S3.E6 ∙ Cold-Blooded Horror
• S3.E7 ∙ Jungle Killer
• S3.E8 ∙ Special: The Deadliest
• S3.E9 ∙ Special: The Most Bizarre
• S3.E10 ∙ Special: The Lost Reels - Amazonian Giant
• S3.E11 ∙ Special: The Lost Reels - Himalayan Giant
• S3.E12 ∙ Special: River Monsters Goes Tribal

• S4.E1 ∙ American Killers
• S4.E2 ∙ Pack of Teeth
• S4.E3 ∙ Invisible Executioner
• S4.E4 ∙ Asian Slayer
• S4.E5 ∙ Killer Sharks and Rays
• S4.E6 ∙ Russian Killer
• S4.E7 ∙ Mongolian Mauler
• S4.E8 ∙ Phantom Assassin
• S4.E9 ∙ Lair of Giants
• S4.E10 ∙ Special: Killer Weapons
• S4.E11 ∙ Special: Lethal Legends
• S4.E12 ∙ Special: Deadliest Encounters
• S4.E13 ∙ Special: Deadliest Catfish
• S4.E14 ∙ Special: Untold Stories

• S5.E1 ∙ Face Ripper
• S5.E2 ∙ Atomic Assassin
• S5.E3 ∙ Killer Torpedo
• S5.E4 ∙ Colombian Slasher
• S5.E5 ∙ Vampires of the Deep
• S5.E6 ∙ Legend of Loch Ness
• S5.E7 ∙ Special: "Year of Beasts"

• S6.E1 ∙ Amazon Titanic
• S6.E2 ∙ Jungle Terminator
• S6.E3 ∙ River of Blood
• S6.E4 ∙ Man-Eating Monster
• S6.E5 ∙ Bone Crusher
• S6.E6 ∙ Body Snatcher
• S6.E7 ∙ Special: Monster Hunting Secrets
• S6.E8 ∙ Special: American Horrors
• S6.E9 ∙ Special: Killer Mysteries
• S6.E10 ∙ Special: Lethal Encounters
• S6.E11 ∙ Special: Worst Nightmares

• S7.E1 ∙ Canadian Horror
• S7.E2 ∙ Mekong Mutilator
• S7.E3 ∙ Jurassic-Sized Prehistoric Terror
• S7.E4 ∙ Alaska's Cold Water Killer
• S7.E5 ∙ South Pacific Terrors
• S7.E6 ∙ Africa's Deadliest
• S7.E7 ∙ Prehistoric Terror
• S7.E8 ∙ Special: Flashback to the First
• S7.E9 ∙ Special: Jeremy's Favorite Moments 1
• S7.E10 ∙ Special: Jeremy's Favorite Moments 2
• S7.E11 ∙ Special: Size Matters

• S8.E0 ∙ Season 8 Sneak Peek
• S8.E1 ∙ Deep Sea Demon
• S8.E2 ∙ Death Down Under
• S8.E3 ∙ Razorhead
• S8.E4 ∙ Devil of the Deep
• S8.E5 ∙ Terror in Paradise
• S8.E6 ∙ Special: Into the Ocean
• S8.E7 ∙ Special: Secrets at Sea
• S8.E8 ∙ Special: Invisible Killers
• S8.E9 ∙ Special: Deadly Superstitions
• S8.E10 ∙ Special: Blood River
• S8.E11 ∙ Special: Killer Discoveries
• S8.E12 ∙ Special: Aftershow

• S9.E1 ∙ Coral Reef Killer
• S9.E2 ∙ Volcanic Island Terror
• S9.E3 ∙ Ice Cold Killer
• S9.E4 ∙ Return of the Killer Catfish
• S9.E5 ∙ Malaysian Lake Monster
• S9.E6 ∙ Special: Killer from the Abyss