Sid returns to Kembleford to ask his old family to help save his new one.
Kevin searches for romance. Kate meets Toby's Crossfit friends. Randall travels to LA to be with Rebecca.
While Appa is reluctant to have a houseguest, Umma is the one who ends up having problems with their visitor; Jung accuses Janet of being cold-hearted; Shannon tackles an office bullying problem.
Stuck in the Vanishing Point, the Paragons search for a way to escape. The futility of the situation is compounded by The Flash's disappearance. However, hope appears in the form of Oliver, who reveals that he has become something else. Meanwhile, the origin stories for The Monitor and Anti-Monitor are revealed This crossover begins on Supergirl S5E09, Batwoman S1E09, and The Flash S6E09 and concludes on Legends of Tomorrow S05E01.
“Worlds lived, worlds died. Nothing will ever be the same.” The crossover starts on Supergirl S05E09 Crisis on Infinite Earths: Part One (I), Batwoman S01E09 Crisis on Infinite Earths: Part Two (II), The Flash S06E09 Crisis on Infinite Earths: Part Three (III) and Arrow S08E08 Crisis on Infinite Earths: Part Four (IV)
Nic and Mina treat a patient battling a failing heart VAD, forcing them to find a new battery to save her life. Conrad gets a call from a patient who is in crisis. Cain tries to get close to Bell's business partner from the supplement company.
Ramsay and his team give Blend on Main a spectacular renovation, a new menu and hope for the future.
A bank holdup leads the team to a safe deposit box, the contents of which have the potential to destroy national security; Kristen is eager to get back into field work while other team members still have their concerns.
Rainbow wants to battle stereotypes at school after she joins the track team and feels like her friends only see her skin color. Meanwhile, Alicia and Paul battle stereotypes of their own, and Santamonica tries to be cool enough to hang out with Rainbow’s friends.
Jo and Brooks assemble an unlikely team as they attempt to communicate with Piper. Meanwhile, Piper is intent on saving Benny from Helen’s mysterious mission, and Alex receives a life-changing offer.
A single mother goes into a deadly rampage at a Public Defender's office, taking justice into her own hands after her son is given a harsh sentence for a petty crime. Also, Jess worries how his daughter Tali is handling life without her mother.
On-air radio personality Bobby Bones joins Bear Grylls for the adventure of a lifetime in a massive Norwegian Fjord! A helicopter ride into the mountains is where their journey begins, but from there, danger lurks at every turn – from giant rock domes and deadly bogs to raging rivers with currents strong enough to move cars. On top of that, the only way to reach their extraction is to rappel down a 300-foot waterfall.
When the body of a missing teenager is found in a field near his village, Nikki and the Lyell team must determine whether the killer is a stranger or a local.
New evidence suggests the swamp may be man-made on a scale the team never could have anticipated.
Madisson introduces Ish to her father, Cara and Garrett reach a crossroads in their relationship, and tempers flare when Juliette and Chloe discuss their fractured friendship.
The NCIS team investigates an F-18 crash and the subsequent disappearance of the pilot; McGee reluctantly discusses a very personal decision with his teammates.
When new server Dayna starts dating Max, Scheana makes Dayna's life difficult; Stassi, Katie and Brittany are bothered by Kristen's ties to Carter; Jax un-invites Carter from the trip to Miami; Lala and James come to terms; Ariana opens up to Lisa.
Volunteers from Ellen's studio audience play her outrageously fun games -- including Dirty Laundry, Great Taj Mah Wall, You Bet Your Wife, Mount St. Ellen and more -- for the chance to win a cash prize.