When Flight 828 lands in New York, Michaela and Ben Stone and the other passengers learn that years have passed, but they haven't aged a day. They reunite with loved ones, piece together their old lives and deal with mysterious voices in their heads.

With the detained passengers secretly moved and subjected to painful experimentation - and Cal's health directly linked to them - Ben takes advantage of an old friend to find out where the passengers were taken. Meanwhile, a mysterious new version of the calling pulls Michaela into a murder investigation that has deep personal ramifications for her.

Tensions flare as the passengers of Flight 828 finally come to understand the meaning of their increasingly terrifying callings. Afraid of losing his daughter to the Church of the Believers, Ben confronts Adrian. Zeke challenges Michaela's trust, and Saanvi seeks help from an old flame.

As Mick and Ben join forces to aid a desperate Flight 828 passenger, Saanvi grapples with a discovery at Eureka, and the burden of secrecy that comes with it. Grace and Angelina's bond deepens. A maturing Cal enlists Zeke's help in a personal matter.

The consequences of Ben's actions tests his marriage and sends Grace reeling. Michaela makes a difficult decision regarding Saanvi's secret. Cal, following his intuition, provides secret refuge to an outcast.

Ben and Saanvi undertake a treacherous mission. Michaela and Zeke race to stop a passenger before his actions turn deadly. Jared and Vance's team up reveals secrets that could upend their lives.

While investigating a Calling, Michaela finds a mysterious stowaway. Ben clings tightly to his beliefs. Cal comes out of hiding to pursue a lead.

A shared vision brings Michaela and Kyle together for a heartbreaking reason. Meanwhile, Eagan offers Ben valuable information — but at a price.

Everyone is forced to adjust as Cal guards a secret, Eagan pursues his own mission, and Michaela uncovers a tragic murder.