With age comes wisdom, or at least the awareness of when to let a stunt double do a scene for you. Maybe it was studying the meaning of death on The White Lotus or just one too many injuries on the set, but Jason Isaacs is more than willing to let stunt professionals stand in for him in a way he wasn't in his younger years. Case in point, he had a really nasty spill while filming Harry Potter, and was knocked out while filming a scene.
Isaacs has talked a lot over the years about Lucius Malfoy and getting into the mind of the evil father of Draco. This included his scene in Harry Potter and the Chamber of Secrets, in which Lucius attempts to attack Harry after he causes him to inadvertently free the House Elf Dobby. The elf launches the elder Malfoy clear across the hall, and as Isaacs revealed to Collider, that scene was particularly violent behind the scenes:
