Mac and the team lose the Compass Killer at the World's Fair site, and they soon discover through the use of astronomy and sunrises that it's only a matter of time before he targets the next victim.
In the culmination of a multi-episode mystery, Mac and his team uncover the dark lair of a murderous madman, the Compass Killer. But as they race to save his fourth victim, the sunrise presents one final surprise that no one ever expected.—CBS Publicity