As threat levels rise, a secret mission to retrieve enemy intel ventures into dangerous territory. An ominous message reaches Earth.

Obsessed with their virtual reality quest, Jin and Jack race to solve a complex riddle — but advancing to the next level brings harrowing consequences.

Auggie's countdown jeopardizes her nanotech work. Jin becomes engrossed in an otherworldly VR game. Ye Wenjie follows through on a radical idea.

Unsettling events put a group of brilliant friends on edge as a mystery unravels with origins tracing back to China during the Cultural Revolution.

Jin seeks justice after a death rattles the group. Investigators learn of an extremist group devoted to an otherworldly entity ahead of a major summit.

A bold proposition for the Staircase Project puts the group at odds. Will weighs his options. Ye returns to a familiar place.

A high-level operation upends Saul's life. With emotions and expectations high, the probe launches into space as humanity enters a daunting new era.

With the world in a state of panic following a momentous declaration, Wade gathers the world's greatest minds to prepare a defense plan.