Investigators travel to Harrison County, Ohio, in the Season 4 premiere to look into the legend of the Stonish Giant, which Native American folklore describes as a Bigfoot with a coat of fur so thick that it cannot be pierced by arrows.

The AIMS team travel to Central Kentucky to search for the Squalling Savage, believed by locals to be at war with another Bigfoot clan.

The AIMS team heads to Blair County, PA looking for a Bigfoot known as the "Lightning Man". After meeting the eyewitnesses, the team believes that the key to this investigation may be a Native American lightning symbol hidden inside a secluded barn.

The AIMS team revisits the most terrifying moments from their epic investigations. Highlights include the Hellhound, Cherokee Death Cat, Cave Creature, Bear Beast, Shadow Creature and the massive Hogzilla.

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The team build their biggest trap to date in order to capture a Bigfoot known as the Ash Man, which Huckleberry recalls having witnessed on his family's farm in Wirt County, W.Va., nearly 50 years ago.

The team travel to Lee County, Va., in search of a Bigfoot feared most by the Cherokee people. After devising a Raven Wing Trap, they come face to face with something they cannot explain, leading them to believe there is something truly evil haunting the forests of Virginia.

The AIMS team revisit some thrilling moments from their Bigfoot quest. The list includes: the graveyard of the Midnight Whistler; the Wildman; the Yahoo; the Dustman; and the most mysterious Cherokee Devil.

The AIMS team reunite with Trapper to get his opinion on how they should take on the legendary Raven Mocker.

The team travel to Wood County, W.Va., searching for a Bigfoot known as the Phantom of the Forest, but soon find themselves in a feud with local poachers who are armed and out for blood.

While AIMS hunt the Ohio Grassman, they come to realize that they are being tracked by a rogue team whose identity they intend to reveal.

AIMS continue to investigate the true identity of the rogue team, but reach a point where they must consider whether this game of cat and mouse is worth the risks, or if they should finally admit defeat and back down.