When officers respond to an Invastion of Privacy call, they find a man in a back alley preparing to smoke methamphetamine. He claims that it is the first time that he has used in eight years.
Kirsten and Shaney find... something, and Dan and Dave come across a stick structure.
Tensions erupt between Stacy and Michael during what should have been a laid back lunch.
Kirsten and Shaney gut out an injury while Stacy and Dave rapell into the cave to collect samples for the field test.
The 5 teams left search for Sasquatch by rappelling into remote caverns at the base of Mt St. Helens. They find a mysterious “apex predator kill zone” that one team believes is where Bigfoot slaughters his prey.
Justin and Ro try to collect insects with their remote controlled quadcopter. Watch out for that tree!
Michael dons a ghillie suit to up his stealth game, and he and Kat make a couple of interesting finds. Meanwhile, Stacy and Dave set up their live bait.
After the six remaining teams continue their quest to find Bigfoot DNA by catching blood-sucking insects, they hunt for Sasquatch at a remote lake, where one team uses another as bait.
Jon Taffer clues us in on a bar science tip for the ages: The Butt Funnel. If you set up a bar so that patrons have to walk closely to pass one another, they'll be more inclined to sit down and have a drink, or four.