S4·E7 Jewel Control

Ros' friend, Sorrel marries Richard Blenko, a two faced man with a silver tongue, who'd give anything to save his own life. He promises a gangster as many emeralds as he'd like in exchange foir his life, using Sorrel's own father, Mr Mandrake, to do so. Mandrake is kidnapped whilst staying at becket's place, who went off with Christa when he was supposed to be assuring Mandrake's safety. Sorrel and Ros are also kidnapped. The gangsters steal the emeralds and then leave a bomb in the bunker where Ros, Sorrel, Mr Madrake and Richard are. Beckett, Jan and a trainee, Melissa have to stop the bomb and the gansters, before it is too late.