Episode 4

S4 E4: Roz's husband Nick is brought in for questioning by AC-12. While Nick denies any involvement in Steve's attack, his suspicion of Roz grows. Meanwhile, AC-12 discover new anomalies in the forensic evidence and issue DCI Roz Huntley with a second Reg 15 notice. AC-12's case appears airtight until Roz fights back with some inside information of her own.