The evil Summer Lowry
Summer Lowry (Danielle Panabaker) is the main villainess from "Psych," episode 6.13 of Medium (airdate January 29, 2010).
Introduction[]
Summer Lowry is a patient at Mariposa Psychiatric Hospital, which was visited by Allison DuBois after learning that another patient, Keelin McKinney, escaped from the hospital. The episode established that Summer was Keelin's roommate, and her introduction saw Summer speak fondly of Keelin to Allison. It was also stated that Summer was hospitalized because she murdered her parents, Todd and Rebecca Lowry; however, Allison's dream showed Summer's parents being stabbed to death by Summer's brother, Chad Lowry.
Allison was led to believe that Chad killed his parents and set up his sister in the murders, though when Allison informed Summer about her conclusion, she disbelieved Allison. After one of the hospital's therapists, Dr. Anthony Woodel, was murdered, it was believed that Keelin (who was his regular patient) killed Woodel, only for another dream to reveal that Chad killed Woodel and set up Keelin, as he had Keelin's hair and her severed hand. Allison informed Summer about her suspicions towards Chad in the murders of both Woodel and Keelin, only for Summer to become nervous and frightened over the thought of her brother being a killer.
Reveal[]
Another dream saw Summer confront Chad and tell him that she can't cover for him anymore, right before Summer stabbed her brother to death with a gardening spade. After Allison learned about Chad's murder, Summer ended up in solitary confinement; however, Allison's last dream of the episode revealed that Keelin had broke away from catatonic state, as well as her habit of repeating Woodel's statements, by revealing statements uttered by Summer--where Summer actually boasted about pretending to be insane and fooling everyone, including her parents. The episode's climax saw Allison visit Summer in her room, and in the form of a story, Allison revealed the entire truth.
As it turned out, Summer and Chad's parents were wealthy, meaning that their wealth was shared with their children. However, Summer wanted it all and wasn't willing to wait to inherit, and at some point, Summer turned heel by colluding with her brother in a plot to kill their parents. Part of Summer's plot included feigning schizophrenic behavior, which also included killing her pet cat. Chad killed their parents under Summer's orders, and while Summer was hospitalized, she boasted about her ruse to Keelin, knowing that she was catatonic. Once Keelin broke through and repeated Summer's statements during her session, Woodel approached Summer and blackmailed her and Chad, leading to Summer enlisting Chad to kill Woodel.
Summer mocked Allison's story, which also revealed that the villainess murdered her brother to get all of her parents money to herself. It was originally believed that Chad was Summer's first time actually killing someone, until Allison revealed that Summer actually murdered Keelin, doing so due to Keelin revealing Summer's evil secret. Allison informed Summer that she not only brought police, she also brought dogs to sniff out the garden that Summer worked on, figuring that Keelin was buried there. Once the dogs started barking, a sign that they found Keelin's body, the evil Summer lashed out at Allison, who marked her verbal lashing as Summer's true colors coming out. Afterwards, Summer was arrested (off-screen) for her murderous plot.