The Winchesters team up with two other hunters to take on the chitters, cicada spirits who possess humans so that they can reproduce.
Audrey and Nathan go after a Troubled who can enter people's dreams, while Duke hunts down his brother.
It's homecoming at Hemlock Grove high school, but everyone in Hemlock Grove is wearing a mask of one sort of the other. Whilst at the crime scene, Peter is confronted by Roman. Olivia reveals a shocking secret while she goes back to Norman.moreless
A new victim is discovered as Peter and Roman work together to find the killer. Dr. Chasseur helps Sheriff Sworn who thinks Peter is a suspect.
As Peter and Roman make progress in their investigation, Sherriff Sworn and Dr. Chasseur fall behind. Letha starts feeling attracted by Peter.
We learn more about Dr. Pryce's relationship with Shelley. The anniversary gala at the Godfrey Institute for Biomedical Technologies doesn't go as planned and Destiny helps Petter.
Shelley commits an act of independence; Chasseur questions Roman but crosses paths with Olivia; Peter and Roman's friendship takes a turn.
Roman goes on a bender and attacks the Godfrey Institute. The episode centers around Roman's revelations and dreams while he is in a comma for substance abuse.
It is time for full moon again and Dr. Chasseur intends to capture the killer. Letha's and Peter's relationship is now in the open.
Roman wakes up from his coma and leaves the house. He goes back to Peter and their attempt to catch the killer during the upcoming dangerous full moon.
Peter and Lynda have to hide after their trailer is attacked by town vigilantes. Roman faces the truth about who he is and Christina disappears.
Dr. Chasseur and Olivia have a rough encounter at the abandoned mill. Peter and Roman discover the killer's true identity and Shelley finally finds out the truth about her family leading to unprecedented consequences.moreless
Stanton Parish plans works to engineer a city-wide blackout... and Hicks defects to help him.
As a member of a jury on a murder case, Jake is determined to see justice done and enlists Mal and Des to help him prove the accused woman innocent. His investigation shows him that not only was the widow not the only suspect, but that the jury is less than fair and unbiased. Kathleen struggles with her current relationships as well as her past ones.moreless
The captives survive a van crash and split up to complete their escape. Janet ends up in a hospital where the Program attempts to recover her. Meanwhile, Kat and Renbe return to San Francisco after learning that Janet has surfaced, but find the police on their trail.moreless
The enigmatic Dr. Helen Magnus recruits insightful forensic psychiatrist Will Zimmerman to join her in the quest to track, study and protect the strange and often terrifying creatures that secretly populate our world.moreless