The episode was praised by reviewers for its high stakes and for grounded storytelling that explored the psychological toll of an agent's past. You can find more details or watch the episode on platforms like Paramount+ or CBS . FBI - S04E20: Ghost From the Past - Discussion : r/FBITV

During the investigation, OA becomes convinced he has spotted a terrorist he encountered 10 years earlier while serving in the Army in Afghanistan.

The episode heavily focuses on , played by Zeeko Zaki.

In this episode, the FBI team investigates the murder of a TSA agent. The investigation reveals a scheme where drug mules are used to exploit airport security checkpoints. As the case unfolds, the team discovers that the criminals are not just smuggling drugs but are potentially linked to a terrorist plot involving a bomb.

Missy Peregrym, Zeeko Zaki, Jeremy Sisto, Alana De La Garza, John Boyd, and Katherine Renee Turner. Guest Star: Shantel VanSanten recurs as Nina Chase.