12 Monkeys: Season 4 - 12 Monkeys: Season 4 - Blu-ray

In Season 4, James Cole and Dr. Cassandra Railly set out on an epic quest, traveling further back in time than they've ever been before. According to legend, their only hope lies with a weapon capable of stopping the Witness for good. But they'll soon discover that in order to win the final battle and save time itself, they will have to make the ultimate sacrifice.