During a political protest an unhappy farmer threatens the U.S. Treasury Department building by parking his tractor full of explosives nearby. Meanwhile, Loker has to bear down with a group of third graders in a field trip stuck in the Lightman Group offices.
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A face from Lightman’s past pulls him into a dangerous criminal conspiracy, testing his friendship and loyalty. Meanwhile, The Lightman Group investigates a high school student’s homicidal threats.