Until a thousand years ago, no humans ventured into the Atlantic or imagined traversing its vastness. But once the first daring mariners successfully navigated to far shores, whether it was the Vikings, the Irish, the Chinese, Christopher Columbus in the north, or the Portuguese and the Spanish in the south, the Atlantic evolved in the world's growing consciousness of itself as an enclosed body of water bounded by the Americas to the West, and by...

After narrowly surviving a massive Wraith attack, the new inhabitants of Atlantis continue to uncover the secrets of the ancients and search for allies in their corner of the universe, but the persistent threat of interference from vicious enemies haunt them in their pursuits. Will they find the elusive power source they so desperately need or the renegade team member they've lost?

Colonel Samantha Carter takes charge as the city's new leader, facing new and daunting challenges, including joining forces with the dangerous Wraith in order to fight a common enemy-- the seemingly unstoppable Replicators.