Undeterred by recent events, DS Steve Arnott continues to find crucial evidence in the Danny Waldron case, and when his theory is confirmed he vows to get justice. DC Kate Fleming discovers that PC Hari Bains is making secret calls to an unregistered phone number while having clandestine meetings with his colleague PC Jackie Brickford. With AC-12's suspicions raised, Steve acts fast - but it is DI Dot Cottan's actions that garner praise.