Jason Isaacs Defends Paapa Essiedu Amid Backlash Over Snape Casting in HBO's 'Harry Potter' Series In a recent interview at Fans Expo, former "Harry Potter" film star Jason Isaacs strongly defended actor Paapa Essiedu against online criticism following his casting as Severus Snape in HBO's upcoming adaptation of the beloved magical series. Isaacs, who portrayed the villainous Lucius...