Six months after the disappearances, the police form a task force. In 2052, Jonas learns that most of Winden perished in an apocalyptic event.

Clausen and Charlotte interview Regina. The Stranger takes Hannah to 1987, where Claudia has an unnerving encounter and Egon visits an old nemesis.

In 1954, a missing Helge returns, but he'll only speak to Noah. In 1987, Claudia brings the time machine to Tannhaus, and Egon questions Ulrich again.

Jonas meets an ominous figure. While the kids comb the cave for answers, the adults gather in the bunker to share what they know about the travelers.

In 1987, Ulrich seizes an opportunity. The kids return to the cave with the time machine, and Jonas learns of a loophole that could change the future.

Armed with a plan to prevent the apocalypse, Jonas travels to 2019. During the Nielsens' anniversary party, Ulrich sneaks off with Hannah.

Martha meets the Stranger and learns his true identity. Claudia tries to prevent Egon's death in 1987. Hannah travels to 1954 to see Ulrich.

On the day of the apocalypse, Clausen executes a search warrant at the power plant as Jonas and Claudia use the time machine to connect past and future.

Tech billionaire Odin Reichenbach hires Sherlock and Joan to investigate a personal threat he suspects originated from within his own company. Sherlock and Joan search for a motive behind three seemingly unconnected murders.

Liv and Ravi each consume the brain of a very dislikable car salesman and inherit his competitive nature.

The team who failed to impress the pool party guests are given only 45 minutes to completely break down a chicken and prepare it into a delectable dish, but one contestant will be forced to surrender their apron after the timer runs out.

A corrupt judge wants in on Teresa's deal when he learns about her business.

Singer Madonna; journalist Guy Raz; Ari Lennox performs.