4731 Dobby's Release is a Harry Potter set that was released in 2002. It is based on the scene in Harry Potter and the Chamber of Secrets where Harry Potter tricks Lucius Malfoy into freeing the Malfoy's slave, the house-elf Dobby. The set is comprised of a small room in Hogwarts with Dobby and Lucius Malfoy minifigures. Tom Riddle's diary with a sock inside is also included. It has 70 pieces.