Movies: Temporary amnesia

In New York City, David Stillwell struggles to recover his memory before the people who are trying to kill him succeed. Who is he, who are they, and why is he surrounded by murder?...

A bereaved wife searches for her lost husband, only to be found with no memory of her and a new woman in his life....

Two people struggle to find protection against gas that causes temporary amnesia before it is re-released into the air again, while also evading deadly enemies that are hunting them....