The Day of Darkness (The Aztecs, Part Four)

History's Greatest Mysteries will investigate a wide range of historically compelling topics and the mysteries surrounding each including the Titanic, D.B. Cooper, Roswell, John Wilkes Booth, and more. Each program within the franchise will showcase fresh, new evidence and perspectives including never-before-released documents to the general public, personal diaries and DNA evidence to unearth brand-new information about these infamous and enigmatic chapters in history.

Resident Alien is a dark, twisted and comedic fish-out-of-water story that follows a crash-landed alien named Harry who, after taking on the identity of a small-town Colorado doctor, slowly begins to wrestle with the moral dilemma of his secret mission on Earth — ultimately asking the question, "Are human beings worth saving?"

In this game show, the game changes every show! Players begin each round without knowing the rules -- and must figure them out while competing to win.

The Chi is a timely coming-of-age story centering on a group of residents who become linked by coincidence but bonded by the need for connection and redemption. Kevin is the pre-teen who must step past shattered illusions and embrace the normal rites of childhood, while Brandon the dreamer makes his own nearly impossible leap of faith to succeed in life and love with girlfriend Jerrika. Emmett is the carefree teen is thrust into complex responsibility with guidance from his mother Jada, and Ronnie is the drifter whose struggle to love and be loved calls into question his every pursuit.

The First 48 follows detectives from around the country during these first critical hours as they race against time to find the suspect. Gritty and fast-paced, it takes viewers behind the scenes of real-life investigations with unprecedented access to crime scenes, autopsies, forensic processing, and interrogations.