William, Kate and George: The New Royal Family

Rivers in the northern Rocky Mountains are explored, including the Colorado, Big Thompson, Cache la Poudre and St. Vrain. Included: their sources; the habitats of the region's indigenous wildlife, including beavers, bears, coyotes and moose.

This episode includes: Thumbs & UD, Update: Marsh, Conway, Honeymoon Bones and Dottie Caylor.

A look at how the aerospace industry became central to the growth of California.

"The Perfect Murder" brings viewers some of the most diabolical, perplexing murder cases to land on detectives' desks – the kind of cases that make or break careers and provide fodder for Hollywood mystery movies. These ingenious killers are every detective's worst nightmare. Whether by planting false evidence, or writing anonymous letters to police, these murderers will stop at nothing to stay one step ahead and get away with the perfect murder. In this program, we focus on the investigation, as detectives slowly put the pieces together to unravel the twisted truth. As detectives uncover new evidence, and turn to new suspects, we flashback through stylized reenactment, to depict each possible theory of what may have happened. For the killer, it's THE PERFECT MURDER. Detectives hit dead end after dead end, and wrong suspects are discarded. But one new clue can lead to another and the cold case suddenly gets hot. Truth is, it's the perfect murder... until it's not.

The disturbing story of cult leader David Koresh is told.