The late Helen McCrory played his wife, Narcissa Malfoy, and the Malfoys are Slytherins. In the books, they are followers of Lord Voldemort but value their self-preservation more. Earlier this month, ...

Severus Snape: Has it ever crossed your brilliant mind that I don't want to do this anymore? Albus Dumbledore: Whether it has or it hasn't is irrelevant; you gave me your word.