A priori - All Episodes

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?

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.

On Last Week Tonight with John Oliver, John Oliver presents a satirical look at the week in news, politics and current events.

Saturday Night Live is an Emmy Award-winning late-night comedy showcase.

Since its inception in 1975, "SNL" has launched the careers of many of the brightest comedy performers of their generation. As The New York Times noted on the occasion of the show's Emmy-winning 25th Anniversary special in 1999, "in defiance of both time and show business convention, 'SNL' is still the most pervasive influence on the art of comedy in contemporary culture." At the close of the century, "Saturday Night Live" placed seventh on Entertainment Weekly's list of the Top 100 Entertainers of the past fifty years.