Comedy-thriller with a terrific lead performance by Stewart. A retiree succumbing to Alzheimer's, Mace Sowell's become increasingly paranoid and taken to carrying a gun and maintaining an elaborate security system around his L.A. home. Mace claims to be an ex-government agent, marked for death by his former boss who's now a presidential candidate. His fears are dismissed by his shrink (Elizondo) and his daughter forces him to get an in-home caregiver, Andi Travers (Williams). But soon Andi begins to think her charge may not be crazy after all.