The fight to save Endlings continues as Julia, Johnny, Tabby, and Finn track Hewes to her Infinitum facility; when Hewes cracks open an orb releasing a dangerous creature, the heroes have no choice but to bring the fight to her.

Hewes uses Johnny and Julia's pasts against them as Ling unwittingly gives Tabby a startling vision of what's to come, forcing the family to decide whether to fight the future or accept it as fate.

While Johnny, Tabby and Finn wrestle with their potential futures, Julia can't leave her past behind; however, when an old threat becomes new again, the group realizes that the actions they take today will determine their tomorrows.

When Julia is forced to face a familiar enemy alone, all of the Endlings are caught in the balance; to save their mission and her new family, Julia must finally face her greatest hurt.

Finn accidentally releases an electrifying new Endling as Tabby struggles with an impending reunion; a sighting of a recently extinct animal leads Mitra and Lopez back to Hewes.

When a playful Endling takes control of the farmhouse, locking Julia, Johnny and Finn inside, it's up to Tabby to save them; figuring out how to stop this temperamental being, means learning how to win its game.

As the search for the polar bear intensifies, the heroes accept a new foster Endling into their family; Tabby reconnects with her old life in a way Finn wishes he could.

As Finn searches for home, Johnny, Julia and Tabby try to save an Endling who no longer has one; when Hewes visits someone from Johnny's past, she puts their entire mission at risk.

The future crashes into the present as Julia, Johnny, Tabby, and Finn deal with the aftermath of Hewes' attack; in the fallout, the heroes will have to choose between coming together or letting their pain tear them apart.

To prevent the future Tabby saw in her vision, the family only has two choices to deal with Hewes -- run away or stay and fight; for Johnny that means moving past his own pain to see that Hewes has vulnerabilities of her own.