Johnny goes undercover to stop a gang war; Jakes and Charlie set out to take over Germaine's business; and Mike begins to piece together Briggs' plan.
The feud between the Sarkissians and a local gang heats up; Briggs' motives are revealed; and Mike hunts for the sarin gas.
In the Season 3 finale, the agents struggle in the aftermath of the gang war; and Briggs tracks down a loose end in order to bring Ari Adamian to justice.
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