Mercy is not long enough to bore you to death—just long enough for a nice nap.

A bargain-basement take on the “Die Hard” formula set in a hospital rather than a skyscraper....Even John McClane couldn’t have saved “Mercy.”

There is little genuine danger in Mercy.

This "Die Hard in a hospital" action movie almost works; it's lean and efficient, but it's also just a little bit too ridiculous and fatally un-self-aware.