Series 3, Episode 6

DI Perez grows convinced that Michael Maguire is implicated in the grisly death of a young man, discovered in a shipping container.

Perez and Tosh's investigation leads them to Glasgow, where they hope to uncover the truth behind Maguire's brutal death and his connection to Robbie Morton. But old ghosts return to haunt Perez, and with his enemies trying to prevent him from getting to the truth, the murder mystery continues.

Perez and his team are determined to track down the person who aided Michael Thompson's killer. But as the case gathers pace, the officers involved find they are all under threat. Sandy comes across the killer by chance in a ruined building, and is knocked out. Tosh, returning from Glasgow, is abducted at the airport.

Tosh returns apparently unharmed, but the truth later comes out. Perez continues to investigate the double murder case, but finds bureaucracy getting in the way, until he tracks down a rape victim and discovers that her attacker was the son of Phyllis Brennan.