I'm not going to claim that Season 1 was completely realistic, but I think because it was so fast-paced, there wasn't a ton of time to pick it apart. Season 2 is a slower-moving mystery, so it's more obvious when things seem unrealistic. Like Kat's boss who's in the process of searching her house for Sirin falling for her offer of sex? If he's a good spy, her sudden change in personality toward him would make him more suspicious... Still, I enjoy this series much more than most shows, because it's fun and the characters are always great.
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