I could not prevent myself to think about Michael Crichton's COMA, or more recently Brad Anderson's FRACTURED, when I watched this tense thriller taking place in a hospital, where some one disappears or is killed and where a bystander tries to understand what really happened. Linda Darnell is outstanding and so convincing in this role that could have fit to her like a glove. I won't spoil it any further folks, just enjoy.