Someone Behind the Door

No memory, no name, no mind: This man will act out someone else's insanity and revenge.

A dark psychological thriller about manipulation and revenge, where a neurosurgeon weaponizes an amnesiac's blank mind to commit murder.

A neurosurgeon with a cheating wife takes an amnesiac into his home and conditions him to believe that the cheating wife is his own and to take the "appropriate" action.