Aka：사건수사대 Q / Les Dossiers oubliés / Odjel Q / Oddělení Q / Afdeling Q / 懸案解碼 / Megoldatlan ügyek osztálya / डिपार्टमेंट Q / מחלקה Q / Dept. Q - Sezione casi irrisolti / 特別捜査部Q / Depart. Q / 悬案解码 / แผนกคดีปิดไม่ลง / Відділ нерозкритих справ / قسم القضايا غير المحلولة / Отдел нераскрытых дел / بخش کیو / Полицијска управа Q / Skyrius Q
Summary：Carl, a former top-rated detective, is wracked with guilt following an attack that left his partner paralyzed and another policeman dead. On his return to work, Carl is assigned to a cold case that will consume his life.
