Episode 2×07 “1988”

A reunited Harris family leads the effort to rescue Caroline and stop the sinkholes from happening, only to face forces that threaten to tear their family apart.

With Lucas’ life on the line, Ty accepts a challenge to win his friend a cure.

Air Date: Tuesday Nov. 15 at 9 p.m. on NBC.

Episode 2×06 “Lazarus”

When their plan to infiltrate the Building goes awry, Gavin finds himself face-to-face with its enigmatic leader.

Eve, Levi, Sam and Izzy are forced to rely on a former adversary to lead a rescue attempt.

In 1988, Josh and Riley enjoy some fun before a startling turn.

Air Date: Tuesday Nov. 1 at 9 p.m. on NBC.

Photos: “Lazarus”

Episode 2×05 “The Heist”

Eve, Gavin and others attempt to commandeer a shipment of black rock to gain access to the mysterious Building, where they believe they may find a way to bring Josh and Riley home.

In 1988, Josh and Riley must act swiftly to prevent Caroline from altering the timeline.

Air Date: Tuesday Oct. 25 at 9 p.m. on NBC.

Photos: “The Heist”

Episode 2×04 “The Fog”

When a fog falls over the Clearing, Eve leads a defense against a group of invaders, only to encounter a threat more dangerous than they’ve faced before.

In 1988, Josh and Riley pursue a woman who may hold the key to stopping the impending tidal wave disaster.

Air Date: Tuesday Oct. 18 at 9 p.m. on NBC.

Photos: “The Fog”

Episode 2×03 “The Great Escape”

After an emotional reunion, Gavin and Eve attempt a daring escape from their unforgiving captors.

Lucas leads a dangerous mission to the fort to reclaim the resources his friends so desperately need.

Air Date: Tuesday Oct. 11 at 9 p.m. on NBC.

Photos: “The Great Escape”

Episode 2×02 “The Cave”

While Gavin enlists the help of his grandfather to guide him to his missing wife, Eve and Levi navigate a horrifying new reality.

In 1988, Josh and Riley discover they’re being followed by a suspicious man who reveals information about the mystery behind the sinkholes.

Air Date: Tuesday Oct. 4 at 9 p.m. on NBC.

Photos: “The Cave”

Episode 2×01 “The Next Day”

PREMIERE

Desperate to reunite with her son, Eve follows a lead that brings her face-to-face with a ruthless prehistoric group.

Gavin, Izzy and Ella question whether they’re fit to survive in 10,000 BC.

Josh and Riley wake up in an unfamiliar time.

Air Date: Tuesday Sept. 27 at 9 p.m. on NBC.

Photos: “The Next Day”