The Knock

A horrifying discovery at a Heathrow warehouse puts Diane on the trail of endangered species and smugglers. Elsewhere, another Triad courier is sent from Hong Kong.

An armed robbery at a West End safety deposit office alerts Andreotti to a major smuggling ring and Diane moves closer in her investigation of the smuggling of endangered species.

Diane's team follows Eddie as brings gold illegally into the country. George decides to up their smuggling operation and take bullion from all over Europe. Andreotti is successful with the Mullvany case.

Eddie is seeking ways of escape as the net closes around him. In Dover, Gerry attempts to smuggle a consignment of gold bullion through the port.

Eddie Davies, a local villain, hires Tommy Maddern to help with his bootleg run from France, selling to local shops at rates they can't afford.

A mobile phone number found on Nadine Charles leads Barry and Andreotti to a known drugs dealer. While Nadine is up in court, her boyfriend names the dealer as a major cog in the wheel.