In January 2022, one of the most powerful volcanic eruptions in recorded history rocked the Pacific islands of Tonga, sending shockwaves around the world. Through first-person accounts of the disaster and eyewitness footage, experience the terrifying power of the eruption and the devastating tsunami that struck the shores of Tonga. Why was this eruption so big, how did it cause the tsunami, and could another disaster loom? NOVA investigates on "Hidden Volcano Abyss."

In 1570 B.C., Rome was a marsh, the Acropolis an empty rock, but Egypt was 1,000 years old. The pyramid-builders were gone, yet Egypt still awaited its New Kingdom, an empire forged by conquest and remembered for eons. EGYPT'S GOLDEN EMPIRE comes to life through letters and records evoking the passion and riches of a time when Egypt was the center of the known world, its Pharaohs called gods, and great cities, temples and tombs built.

As drugs flood the streets of '90s Britain, a team of civil servants is thrust undercover to topple the gangs behind it.