
Undercover - Season 4
Six months after the recent events, Martin Hristov is officially a police officer in the GDBOP, in the department of Commissioner Emil Popov. Ivo rules the street, disguised behind a legal business. Next to him is Nia Tujarova, who has returned from New Zealand in an attempt to reconcile with her father Djaro. Djaro is in Turkey to make contact with the Turkish mafia and is involved in the restoration of an international drug channel through Bulgaria. Tragedy overtakes Kukata in his Spanish exile – he returns to Bulgaria with a plan for revenge. Martin took advantage of his desire for revenge. The two make a deal that affects the interests of Ivo, Jaro and the Turks in life and death.
Episodes

Episode 1
Episode 1
Martin is a police officer in Popov's new crew in the Organized Crime Unit. Ivo controls the streets, hiding behind his legal business.

Episode 2
Episode 2
When Ivo and the Hook go to the port to get Jaro they walk into an ambush. But the Hook had warned Martin and the police intervene.

Episode 3
Episode 3
Jaro steals a car and evades the police ambush. A crazy car chase takes place on the tourist-ridden streets of the resort.

Episode 4
Episode 4
Jaro carries a big heroin shipment by train using refugees and a corrupted customs officer as a cover.

Episode 5
Episode 5
The Lizard blows up Ivo's drug lab, igniting a gangster war. The Lizard kidnaps Ivo. Martin and the Hook capture the Lizard to trade him for Ivo.

Episode 6
Episode 6
Martin must prove his loyalty to the police force, prompting him to seek assistance from the inside.

Episode 7
Episode 7
Ivo and the Hook robs a casino. Martin and Manolov are among the officers waiting for them. During the shootout Martin accidently shoots Manolov.

Episode 8
Episode 8
As a revenge for the casino hit, Faruk attacks Ivo's whole gangster empire. The Hook finds one of his family's killers.

Episode 9
Episode 9
Ivo is facing a murder conviction if Alex doesn't withdraw her testimony. Popov is ready to bust the Turkish drug trafficking scheme.

Episode 10
Episode 10
When the police crush all the illegal business of the Turkish mafia in Bulgaria, Faruk orders Jaro to murder commissioner Popov to test his loyalty.

Episode 11
Episode 11
Faruk's people kidnap Jaros daughter. Jaro informs the police and manages to save his child. At Zornitsa's funeral, Jaro gives himself to Petrov.

Episode 12
Episode 12
Martin tries to protect Popov after Jaro's murder. Ivo uses Bardem's greed to lure Faruk to Sofia and to take over his business.