How secure is our future? This eye-opening documentary -- which uses computer-generated imagery to illustrate an asteroid collision, black holes and worldwide plagues, among other threats -- explores seven scenarios that could spell the end of the world. Interviews with noted scientists examine the extent of preparations for these cataclysmic events and what's being done to save future generations from extinction.

NOVA biography of Albert Einstein, covering his early years, relativity research and personal life.

William Shatner sits down with scientists, innovators and celebrities to discuss how the optimism of 'Star Trek' influenced multiple generations.

A Tear in the Sky takes you on an unprecedented journey into the UAP/UFO phenomenon as we follow a team of world-renowned experts, scientists, and military personnel who will attempt to unravel the UAP/UFO mysteries using state-of-the-art, military-grade equipment, and technology. While the UFO phenomenon has existed since the dawn of recorded history, very little scientific research is accessible to the public. Most of the serious research is conducted by various governments and militaries across the planet; this film is a documentary on how a team of military veterans, scientists, and researchers come together and launch an investigation into this fascinating world of the unknown while providing the data and results to the public.