S04E20 Ghost from the Past

• Sezonul 4, episodul 20
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• Difuzat marți, 10 mai 2022
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• 43 min

The murder of a TSA agent leads the team to hunt down a killer who is using drug mules to exploit airport security checkpoints. Also, OA struggles to cope with the aftermath of the sarin gas exposure and the 10th anniversary of his army friend's death in Afghanistan.