In Plain Fright is a Halloween-themed episode of the dramady Psych. It was originally aired in the US in 2010.
Plot
Shawn Spencer, and police detective, Juliet O'Hara, have recently started dating, They decide to keep their relationship a secret. Juliet shows Shawn that she got tickets for scare fest, a Halloween carnival held in a park. This carnival used to be held annually, but ended fifteen years earlier. The park decided to restart the tradition that year. Shawn tells Juliet that he already has tickets to go with his best friend, Gus. Juliet tells him that he should tell Gus about their relationship, but Shawn tells her it is better to be kept a secret.
Shawn and Gus arrive at scare fest, and go onto a haunted house ride. On the ride, Gus is terrified, and puts his head down. Suddenly, Shawn sees a man getting murdered, and put into a coffin. When Shawn and Gus get out of the ride, Shawn tells the ride operator, Carol, about what he witnessed. Carol doesn't believe him, and tells him that what he saw was probably part of the ride.
Despite what Carol said, Shawn is still convinced that a man was murdered. He finds his former assistant, Ken, who now has a job at the park. They ask him if he could let them sneak into the haunted house ride. Ken reluctantly agrees, and Shawn and Gus go in. They open the coffin where Shawn saw the man was put into, but it is gone. Suddenly, the park's security arrives, and bring them into the administration office. There, they meet Eve, one of the park's officials. Suddenly, Shawn notices a picture of a man on the wall, and recognizes him as the man who was killed. Shawn tells Eve, who says that the man is park president, named Wayland, and has been missing for a few hours. They decide to investigate the haunted house, and find the president indeed had been murdered in the ride.
The park's vice president, Frank Holloway, tells Shawn that he knows who the murderer is. His name is Johnny Rickets. Shawn is excited to have a suspect, but Holloway reveals that Johnny was a kid who died by falling off scare fest's ferris wheel, fifteen years ago, the last year they did scare fest, until this year. Holloway says that he's been seeing Johnny lately, so his ghost must be haunting the park, and killed Wayland.
Juliet tells Shawn and Gus that she looked into Johnny Ricket's death, and discovered that, the park ruled it as accidental on Johnny's part, and the state didn't look into it. Shawn, using his "psychic" powers, comes to the conclusion that Holloway is the murderer, and he made up the ghost as a cover up. He killed Wayland, because he wanted to become the new president. They go to the park to confront Holloway, but find that he has been murdered on the log ride. They check the footage of the ride's photo-cam, and see Johnny Rickets was on the ride.
Following Hollowat's death, the park is shut down, and the police department is investigating the two deaths. Shawn and Gus decide to check the archives about Johnny Ricket's death, believing that has to do with the two deaths. Shawn discovers, that both Wayland, Holloway, and Eve were working the night of Johnny's death. They made Eve testify that it was not their fault that he died. Shawn also discovers that the park paid off Ricket's family, as well as a person named Jamie Emerson.
Back at the police department, they discover that there is no death certificate for Jamie Emerson. Shawn realizes that Jamie is the murderer, and has been murdering everyone who falsely was working that night, and lied about Johnny's death. Suddenly, Shawn realizes that Eve will probably be the next victim to be murdered.
Shawn and Gus go to the park, and find Eve there, hiding. She admits that she has also been haunted by Johnny's ghost, and suddenly, a figure appears. It is Carol, the ride operator of the haunted house ride. Shawn figures everything out. Carol's real name is Jamie Emerson. She was on the ferris wheel with Johnny the night he fell off, but unlike what was reported, it was the park's fault. The latch belt wasn't properly locked. Both her and Johnny fell off, but Jamie miraculously survived. She was angry that the park didn't take responsibility for what happens, and instead, paid the families off to say that it was unavoidable. Out of revenge, Jamie dressed up as Johnny Ricket's, and killed Wayland, and Holloway for this.
Jamie suddenly takes out a knife, and chases Eve, Shawn, and Gus. Shawn, however, manages to hit Jamie with a dart, making her drop the knife. Soon, the police arrive, and arrest Jamie, and her boyfriend, who also helped with the murders.
At the end, Shawn tells Gus about his relationship with Juliet. He is shocked to hear, that Gus already knew.