Harry Potter and the Chamber of Secrets · Chapter 12
Polyjuice Potion Infiltration of Slytherin
Harry, Ron, and Hermione use Polyjuice Potion to impersonate Crabbe, Goyle, and Millicent Bulstrode, infiltrating the Slytherin common room to question Malfoy about the Chamber.
Outcome
Malfoy denies involvement but reveals his father's role in Dumbledore's suspension; Hermione's transformation backfires with cat hair.
