Michael Long / Michael Knight

They're fighting to save patients while their personal lives are brimming with drama and intrigue. Everything's at stake on the emergency ward.

Ancient Aliens explores the controversial theory that extraterrestrials have visited Earth for millions of years. From the age of the dinosaurs to ancient Egypt, from early cave drawings to continued mass sightings in the US, each episode in this hit History series gives historic depth to the questions, speculations, provocative controversies, first-hand accounts and grounded theories surrounding this age old debate. Did intelligent beings from outer space visit Earth thousands of years ago?

The Real Murders of Atlanta portrays the horrifying cases that highlight the boundaries between gentrified Southern dynasties, hip-hop hustlers and the flashy nouveau riche of this metropolitan mecca of music, entertainment and tech. Told by the investigators, witnesses, reporters and loved ones who have direct connections to the cases, each hourlong story brings Atlanta's hustle and deadly decadence into sharp focus. It's the dark side of the New South, where deadly battles for status and affluence emerge between those who are willing to kill for the good life and those willing to kill to keep it.

Criminal Minds revolves around an elite team of FBI profilers who analyze the country's most twisted criminal minds, anticipating their next moves before they strike again.

Eighteen to twenty castaways will compete against each other on Survivor. All castaways will compete to outwit, outplay, outlast and ultimately be crowned Sole Survivor.