The team's former female colleague has secretly created a clone of Lindsay that possess rapid healing. Connor reappears and warns the team that the clone is actually a highly unstable and dangerous human-alien hybrid.
A terrified family man starts seeing demons and soon so does his wife. A desperate Englishman who seemingly appeared out of nowhere claims to be a farmer from the 17th century.
In this comical meta episode, Mia takes Lindsay to a rave night club that turns out to be a front for hungry vampire-like ghouls. Meanwhile, Peter must deal with an aggressive female TV producer who wants to make a TV show about the team.
A mysterious, deadly, ancient parasite that survived the Ice Age hidden in the frozen corpse of a Mylodon or giant sloth wreaks havoc at a remote Russian scientific outpost. The O.S.I.R. team is sent to help their Russian counterpart.
On a stormy night, a single mother discovers in shock the exact duplicates of all three of her pets and even her young son in their house. A little girl befriends what seems to be the ghost of a girl from the 1920s.
The statue of a headless soldier from the Terracotta Army given to a museum as a gift by the Chinese consulate comes to life and starts decapitating people.
Some kind of giant reptile is slaughtering people in Lyon, France. A farmer that lost his hand in an accident develops psychokinetic abilities but refuses to accept this fact.
The Houdini Gang, a cowboy trio straight out of 1899, is stealing bullion from a bank's vault when their time machine breaks down. They take Peter hostage. Outside, familiar stranger approaches Lindsay and her psychotic SWAT leader beau.
Something is slaughtering NASA scientists and National Guardsmen sent to investigate a fallen meteor in a forest. The team's other case involves a family that's apparently become the victim of random apportation or teleportation.