This chapter examines the law of attempts. It considers the precise mens rea for attempt: whether in addition to intending any result required for the crime, D must also intend the circumstances of the substantive offence in order to be guilty of attempting it; how far D’s acts must go in committing the substantive offence before he will be guilty of an attempt; whether the law criminalizes D who attempts to commit an offence even though on the facts it would have been impossible for him to commit the substantive offence; and reasons as to why it is appropriate to criminalize attempts to commit crimes.