:Episode 4 - The List:

Arab journalist Momi El Fassad is shot dead by a motorcyclist brandishing an Uzi in the middle of a busy high street, while Henno and Louis wade through rat-infested sewers to find a secret access door to an old World War Two bunker.

Expert safe-cracker John Magnusson is picked up by Ricky, Pete and Jamie as he tries to steal a diamond bracelet. Caroline offers Magnusson a deal - if he breaks into a vault for them he will be given his freedom.

At a briefing, Dempsey and Pru reveal that El Fassad was killed by a member of a new secret terrorist organisation. The group, known as the Zukenish, have a list of targets - controlled by American diplomat Art Spellman and held in a British safe.

Mossad asks the SAS to get the list, but it's a black bag operation - not officially sanctioned and anyone caught will be disowned by the regiment. Caroline is confident, especially with Magnusson on her side, but Macalwain decides not to put his job on the line in someone else's battle.

Red Troop plans the raid on the vault at Hartington's safety deposit centre, via the sewers and secret underground wartime bunker. There's just one problem - the list is in an unidentified security box inside a new, virtually impregnable vault. The bunker leads to the vault reception area, meaning Magnusson has to crack a state-of-the-art electronic door.

Jamie and Ricky pose as customers to fit a transmitter to hack into the CCTV system but the sensors on the vault walls will require high-tech surveillance decoding by Pru. Magnusson tries his hand on a similar vault door - he succeeds, but it takes him over six hours.

Spellman arrives at the centre to get details of the next target and Pru identifies his box. But as the operation gets closer, Jamie hears the news that his mother has died. Mrs Twamley meets Macalwain in a café to talk about Pete, and breaks down. She’s desperately unhappy but Macalwain misreads her signals.

It's the day of the robbery and Red Troop go down the sewers, dressed as water officials. While Louis covers any noise with a jackhammer, the men break through the bunker into the reception. All is going well until security guard Wallace Burton gets suspicious and Magnusson's greed puts the men in dire jeopardy...