Episode 12 of "Hustle"
s02e06 Eye of the Beholder

Mickey's got a plan and this one is like no other. They're going to steal the Crown Jewels. Initially, the gang assume Mickey is joking - they are not thieves but Mickey asks them to trust him and so they reluctantly agree to the elaborate con. This will be the biggest challenge they'll ever undertake, but Mickey's convinced they're good enough to pull it off... Posing as a cleaner, Ash gets a job in the gallery where the diamond is going to be exhibited. The news isn't good - it will be virtually impossible to get near the diamond with the level of security. The plan is to cut power for 30 seconds, use the blackout to re-route the CCTV and with all the alarms on the street going off, turn off all the motion detectors. The gang are ready - but so are the police. Surrounding the gallery and desperate to catch Mickey and the gang in the act, the police lie in wait. The gang are one step ahead and when the police charge into the gallery they discover that the gang have disappeared - and so has the diamond. However, the team are caught by surprise when they arrive home later that night and the police are ready to take them into custody. Will they evade capture and live to con again? Yes indeed they will, they managed to full the police and flee the city. They're up to more cons in the third season.