Psych (2006)

S3E15 Tuesday the 17th

Shawn and Gus are approached by a childhood friend to investigate the mysterious disappearance of a camp counselor near their old summer camp. As they arrive, they encounter eerie occurrences that suggest the camp's sinister history may have resurfaced. Determined to solve the mystery, they delve into the camp's dark secrets to uncover the truth behind the counselor's vanishing.