The siblings get to know some more of the 43 children in an alternate timeline.

With their Number One missing, the Sparrows take a hostage. Allison makes a painful discovery. Klaus takes Five on an eye-opening road trip.

As people start disappearing in waves, Five and Lila reluctantly team up to solve their time-travel problem. Klaus sees a new side of his father.

Luther and Sloane hatch a plan to end the war between the families. Viktor reconnects with someone from the past. Five has an unsettling encounter.

Klaus's relationship with death proves more complicated than anyone knew. Viktor finally learns what happened to the Umbrellas' mothers.

Five chases down Pogo, Viktor and Harlan attempt a transfer of powers, and Diego and Lila venture beyond the wall of the White Buffalo Suite.

In 1989, Lila digs up one of her mother's secrets. The families join forces to fight the Kugelblitz. Reginald teaches Klaus to harness his powers.

With the universe collapsing around them, the gang gathers for a day of romance, awkwardness and debauchery at the Hotel Obsidian.

Reginald goes all out to convince the children to sign on to his plan. Five tries to recover a drunken memory. Allison has a change of heart.

Shaken, the family confronts the deadly mysteries of the Hotel Oblivion - and the growing suspicion that their mission is not what it seems.