Mickey Spillane's Mike Hammer (1958)

That School Girl Complex (1x37)

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Mike is hired to find the culprit behind a series of pranks at an exclusive girls' prep school - students have been poisoned, burned with acid and now shot at. Mike has three suspects: an elderly caretaker who was forced to retire, a middle-aged administrator who was passed over when the new head mistress was hired by the school's Board of Trustees, and lovely student who craves attention.