Anyone watching the second episode of the latest season of Homeland closely might have spotted a subversive message lurking in the background.

The episode, which aired in the U.S. on Sunday, saw former CIA agent Carrie Mathison visit a refugee camp on the Syria-Lebanon border. It was actually shot in Germany on a hyperrealistic set created on the site of a former animal-feed plant on the outskirts of Berlin, where much of the new season is centered.

However, the Arabic graffiti added to the walls of the camp actually criticized Showtime's award-winning drama. One shot from the episode sees Mathison, played by Claire Danes, stride past a wall with the message "Homeland is racist."

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