Shanley Caswell (“Bones”) and Spencer Locke (Resident Evil: Extinction, “The Vampire Diaries”) have been cast in the horror comedy Detention opposite Josh Hutcherson and Dane Cook. Directed by music video helmer Joseph Kahn (Torque), the indie film revolves around teenagers who have more on their minds than finals during their senior year of high school: A serial killer seems to be on the loose. Caswell will play a cute but awkward girl trying to connect with her school crush (Hutcherson), and Locke will play her nemesis, the head cheerleader. Kahn wrote the script with Mark Palermo. Shooting on the $10 million pic begins this month in Los Angeles.