Examines three cases where homicides were committed in the name of love. First, in Dallas, a couple is shot to death on their doorstep, and detectives have to track down the killer as he goes on a multi-state crime spree. Then, in Louisville, a hearing-impaired man is stabbed in his doorway. And finally in Tulsa, a woman's body is found in a trash can. Can her death be linked to the murder of her fiance the year before?

Critical Minutes looks at three cases from The First 48 that take place in the brutal underworld of illegal drugs. In Tulsa, a homeless dealer is ambushed on a dark trail. In Cincinnati, an elderly man is strangled in his apartment. And a parking lot drug deal in Atlanta turns into a shootout that leaves two men dead.