NBC | 8:00 pm

In a taut new hour called "The Big Blast From the Past Episode," citizens are paralyzed with fear as a bomber wreaks havoc, and the villain forces Weller (Sullivan Stapleton) and his teammates to look for clues to his identity and motive in one of their past cases. Jaimie Alexander, Rob Brown, Audrey Esparza, Ashley Johnson and Ennis Esmer also star.