Episodes
1. Birthday PartyYounes stumbles upon a murder case in which an entire family has been killed during a birthday celebration.
2. The Serial KillerYounes stumbles upon other murders where the common thread is the blood relation of the victims to one another, and he realizes they are dealing with a serial killer.
3. Contaminated VaccinesYounes obtains clues that relate to the contaminated vaccines case in which Amir-Ali Nadaf had committed murders.
4. A New MurderA new murder is reported, and the handling of the case is transferred from Younes to Mohsen Mowla, but Amir-Ali Nadaf prevents Younes from leaving the investigation.
5. The Big SecretAmir-Ali Nadaf reveals a big secret to Younes: a case from the past that plagued Nadaf and changed the course of his life.
6. The Story of the ConspiracyNadaf recounts to Younes the story of the setup he was framed with years ago. Simultaneously, Sohrab, the only child of the person who saw the face of the serial killer, returns to Iran because his father is still alive.
7. New CluesNadaf attempts to get closer to Bahar, who is one of the survivors of the past murders, while Younes and Mohsen also obtain new clues.
8. The Common ThreadYounes and Mohsen discover common threads among the victims, while Nadaf remains haunted by a lost past.
9. Solving the MysteryYounes, now almost certain that Amirali Nadaf is not the killer, enlists his help to solve the mystery, while Siavash also offers to assist, unaware that Amjad is the one responsible for his father's death.
10. The Vaccine CaseYounes, Amirali Nadaf, and Siavash join forces to track down one of the individuals involved in the contaminated vaccines case.E1111. Episode 11E1212. Episode 12E1313. Episode 13E1414. Episode 14E1515. Episode 15E1616. Episode 16E1717. Episode 17E1818. Episode 18
