Michaela 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.
Michaela's premonition leads her to pursue a fugitive; Ben tries to gain the trust of an unlikely ally; Olive's relationship with Levi leads to a fascinating discovery; Jared and Drea uncover devastating secrets; Saanvi faces a dilemma.
Ben and Saanvi join forces with Vance in his newest venture to understand Flight 828; Michaela and Zeke adjust to their new home life together, but they pivot to aid a non-passenger with a looming death date of their own.
Michaela 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.
Michaela struggles to help the passengers avoid a deadly threat; Ben and Saanvi undertake a treacherous mission to save someone they love; Jared and Vance team up, but their partnership reveals secrets that could upend their lives.