At 2:50 p.m. on April 15, two bomb blasts turned the Boston Marathon finish line from a scene of triumph to tragedy, leaving three dead, hundreds injured and a city gripped by heartbreak and terror. Less than five days later, the key suspects were identified and apprehended, with one dead, the other in custody. How did investigators transform the chaos of the bombing into a coherent trail of clues, pointing to the accused huggers? NOVA follows the manhunt step-by-step, examining the role modern technology - combined with old-fashioned detective work - played in cracking the case. Given hundreds of hours of surveillance and bystander videos, how did agents spot the bad guys in a sea of spectators? Why couldn't facial recognition software I.D. the criminals? How much could bomb chemistry analysis, cell phone GPS, infrared imagery and crowd sourcing reveal about the secrets behind this horrific crime? With the help of top criminal investigators and anti-terrorism experts, NOVA explores which technological innovations worked - and which didn't - in the most notorious case of today, and how the world of crime fighting could be transformed tomorrow.

NOVA Season 40 Episodes...

• s40e01 - Secrets of the Viking Sword
• s40e02 - Forensics on Trial
• s40e03 - Mystery of Easter Island
• s40e04 - Ultimate Mars Challenge
• s40e05 - Inside the Megastorm
• s40e06 - Doomsday Volcanoes
• s40e07 - Decoding Neanderthals
• s40e08 - Rise of the Drones
• s40e09 - Who Killed Lindbergh's Baby?
• s40e10 - Building Pharaoh's Chariot
• s40e11 - Earth From Space
• s40e12 - Mind of a Rampage Killer
• s40e13 - Meteor Strike
• s40e14 - Ancient Computer
• s40e15 - Australia's First 4 Billion Years - Awakening
• s40e16 - Australia's First 4 Billion Years - Life Explodes
• s40e17 - Australia's First 4 Billion Years - Monsters
• s40e18 - Australia's First 4 Billion Years - Strange Creatures
• s40e19 - Manhunt - Boston Bombers
• s40e20 - Oklahoma's Deadliest Tornadoes

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.