Jackson faces the most difficult decision of his life. Also, Mitch reluctantly enlists help from his father, Max Morgan, to investigate the origin of the final set of triple helix animal bones,

The team sets out on a rescue mission for Abe and Dariela’s son, Isaac. Then, in search of information on a new hybrid, Mitch and Jamie travel to California, where they cross paths with a familiar face from their past.

Abigail holds Jackson prisoner in order to extract information from him that is critical to her secret master plan, and the team faces a mid-air crisis when their plane experiences an electrical malfunction

After Mitch’s alter ego, Mr. Duncan, attacks the team’s plane then flees, Jamie, Abe and Max set out to find him and help.

After Jackson attacks Abigail, the team rushes to save her as her life hangs in the balance.

As the team is trapped inside the plane by toxic spores surrounding them, complications arise during the delivery of Clementine’s baby.