Once a Crook (NCIS)

[1] When the body of a cryptoanalyst, Petty Officer First Class Andrew Wells is found dead on the road, Gibbs and the team are called in to investigate.

The team at first believes that the murder is related to espionage, but find out that the cryptoanalyst was merely being scouted for a lucrative job in the private sector.

Tony stumbles across evidence that implicates Anton Markin, a man he had met when he was still a Baltimore police officer.

Throughout the episode, Tony is suffering from a severe case of insomnia due to Ziva's departure, and hasn't slept in days.

Some of it was shown in "Baltimore", "but what this episode shows is more how these guys have a shared understanding of the job", Weatherly continued.

On September 26, TV Line announced Harshman's return, and wrote that she had "the potential" to become a recurring character this season.