Tony Curran

A scientist is deliberately exposed to a deadly toxin at a high-security biological research facility. Before she dies, she calls Jane to ask for his help in finding her killer. Once the agents have arrived on scene, however, another empty flask of the toxin is discovered, suggesting all those inside the facility have just hours to live.

Barry meets Black Lightning in the Hall of Justice after things take a dire turn with Despero, and Iris seeks help from a powerful ally when she suspects something is off with Despero's vision of the future.

Despero warns The Flash that great tragedies will lead to Armageddon; Barry doubles down on proving his innocence, but a devastating revelation pushes him to seek counsel from Black Lightning.