The team is reassembled to investigate the reappearance of Joanne, one of the people who went through the mysterious arch from the previous episode and is now obsessed with returning to it. Peter and Curtis try to find Anton.

Anton inexplicably reappears, but he's now dying from the arch's effects. Matt suspects that Elsinger knows more than he's admitting.

Something is creating dead zones on the land that's been given by the government to the Cree a long time ago, and people have now begun dying as well. Some believe it's supernatural, but the team has a more conspiratorial theory.

The bodies of a prospector and a young-looking old woman that mysteriously appeared in an unfinished building imply that the past, the present and the future might somehow be intersecting at that spot. The team's psychic, Kate, helps out.

A mysterious killer with both male and female DNA is taking out the cops who covered up a questionable shooting. Their tongues are ripped out and spines crushed. Matt's ex, who was the reporter covering the shooting, contacts Matt.

Inexplicably unhinged Matt is arrested for killing the young psychic son of a drug dealer. He's taken for treatment to a psychiatric facility that may or may not be run by demons. The team tries to figure out what's going on.

The troubled, nerdy, young adopted brother of Matt's daughter's best friend is targeted by tiny but vicious forest trolls. Or are they just a figment of his imagination? Also, Matt's daughter falls for Peter.

Anton begins suspecting that his long lost wife, who came back from the arch with him, is actually a doppelganger planted by the Old Ones from H.P. Lovecraft's stories. He takes drastic measures to determine the truth.

Linda Blair guest stars as Rebecca Royce, a successful author with a multiple personality disorder. Her hit novel All Hallows Horror has inspired a copy cat killer who is murdering his victims in the same fashion as the characters in Rebecca's book. The OSI Team (Office of Scientific Investigation) must race to discover the connection between Rebecca's novel and the murders before the killer strikes again ! Written by Walter Down

Peter's ex teammate drops dead during a street dance party. He revives during the funeral only to be killed again by black magic tied to Santería. His strange girlfriend becomes the team's first suspect but things aren't that simple.

On the Welsh coast, Lindsay's archaeologist mentor and old flame discovers a burial site with a coffin that contains the winding-cloth (death shroud) of a sadistic medieval overlord. An evil cult kidnaps him.

There has been an unusual death of a Capybara at the Windsor Animal Hospice. Was it attacked by a Chupacabra? A worker claims to have seen it. Is his drawing of it authentic? Some skin samples of a possible attacker has scales that have a Harlequin pattern.

A woman is somehow physically injured by the virtual reality space shooter game she's testing with its programmer. The team suspects that the game triggered suppressed traumatic memories of her life in communist China in 1989.

Peter goes undercover as new inmate in prison to investigate the baffling death of a convicted murderer, who somehow choked on dirt while being in solitary confinement known as Room 216, a place where terrors from the past can kill.

Lindsay falls for two men - a shady, charismatic nightclub owner and a charming, middle-aged widower, who are both connected to the case of a dead junkie drained of blood that the team is working on. Could one of them be a vampire?

The team arrives in a strange, secluded, reclusive and highly inhospitable gated community to interview two of its residents, who claim to have been the recent victims of alien abduction. But who's really observing who in this odd town?

After a shop teacher is almost killed by a car with no engine, the OSIR investigates antisocial teens with telekinetic powers in a high school for troubled youth. Also, the team's personal lives get more complicated.

The team investigates the gruesome death of two programmers, who were working on a Y2K bug patch for a big security firm. Their brains were somehow destroyed by a strange computer virus. Also, Matt's relationship with Claire falls apart.

In this clip-show, the team is put on trial before an ad hoc tribunal. The prosecutor reexamines some of their cases involving aliens in order to debunk them and prove that aliens don't exist. Peter is poisoned before his testimony.

A janitor with amnesia turns out to be a genius savant. He helps Peter successfully test a new experimental EMP weapon for the government and befriends him. However, he's haunted by the memory of an assassin killing his wife.

Faith healer Nicholai Mosher is taken in by the OSIR to help a dying child of an influential man. He fails and the child dies. Nicholai is soon assassinated as payback. The people behind his death start dying supernaturally.

Elsinger's boss is revealed to be a nearly immortal evil Frenchman, who seeks the key to immortality and is ready to kill the entire team to get it. The team tries to expose him with Kelly's help, but Elsinger has something else in mind.