Smithy is assigned to meet arms dealer Dimitri while the rest of the gang hang back to check the weapons really have arrived before producing the money. Stevie makes the most of posing as the sergeant's girl by surprising him with a smouldering kiss that leaves him reeling, but greater dangers await the pair as gang outsider Kieran Wallace cuts up rough about the gun planted in his car. Later, Smithy meets up with Bob Gatting, the leader of the SE1 gang - and it ends badly for Wallace, who is beaten up by Gatting's thugs - and during a violent confrontation, Smithy is forced to reveal his true identity.
- Alex Walkinshaw as Sgt Dale Smith
- Christopher Fox as DS Max Carter
- Lucy Speed as DC Stevie Moss
- Andrew Lancel as DI Neil Manson
- Roberta Taylor as Insp Gina Gold
- Daniel Flynn as Supt John Heaton
- Patrick Robinson as DC Jacob Banks
- Sam Callis as Sgt Callum Stone
- Bruce Byron as DC Terry Perkins
- Abhin Galeya as PC Arun Ghir
- Dominic Power as PC Leon Taylor
- Clare Foster as PC Millie Brown
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