The Coopers discuss the possibilities of black holes and alternate universes when Dr. Sturgis comes over for dinner.
When experts spot what appears to be an abandoned city in the Caspian Sea, they investigate declassified Cold War evidence to reveal an Atlantis-like city built by the Soviets; what they find exposes its long-lost secrets.
When Art asks Riley and Al to make speeches at a fundraiser for interpreters that are waiting for visas, Riley has a hard time accepting the attention. Riley also comes face-to-face with Vanessa’s boyfriend.
Gina and Drew plan their futures now that their surgery is finally scheduled.
The family makes a big decision about the future of the show and reflects on how "Keeping Up with the Kardashians" will truly be an end of an era. Kris goes on a girls’ trip to decompress from the decision.
Ben and Dean wrestle with life and death after the Black Fighter’s Coalition banquet.
The women attend a gala honoring Marjorie, but Bonnie's speech doesn't go as planned.
Jackson pays a visit to his father that helps set him on the right path.
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.
After receiving some inspiration from Cleo, Hope and Landon set out on a new mission. However, when that plan takes an unexpected turn, Josie and Wade step in to lend a hand. Elsewhere, Lizzie enlists MG’s help learning more about Finch.
Det. Cooper fills in the blanks of last night's events to a woozy Cullen while Dirk finally meets Terry. Janice and Fatima return to dispatch.
Mick questions Ben's developing relationship with Eureka. A new adversarial group suspicious of Ben takes drastic measures to gain answers. Saanvi proves her worth through a scientific breakthrough. Angelina reaches a breaking point.
Clarice feels an emotional tie to the victim when ViCAP investigates what appears to be the suicide of a medical student in the United States on a foreign visa. Also, Krendler secretly collects a DNA sample from the man he suspects attacked Clarice at Woodhaven.
With the Sidestep now in their name, Walker, Stella and August put their stamp on the place. Liam turns to Bonham for advice on a career move, while Micki and Trey work through the aftermath of his injuries after the hurricane. Stella confronts Clint about Trevor and his response prompts Stella to make a dangerous decision that will leave a permanent mark on the Walker family.