On their way to an auction to bid for a building neighbouring the Thrift, Robert and Eleanor are caught up in a horrific train crash on the underground near King William Street station. Robert suffers a broken arm, and so is only able to direct Eleanor in amputating the crushed leg of a fellow passenger, in order to extricate him from the wreckage. Upon bringing their patient, Peter Mills, to the Thrift, they are surprised when his two younger brothers arrive on the scene and take up protective positions. It turns out that the Mills brothers are notorious local gangsters, and soon the grateful Peter produces the deed to the building Eleanor had presumed was lost. But there is a price to pay, and when Peter's wound turns septic with gas gangrene, he will not allow anyone but Eleanor perform the further amputation. His brothers are more than a little obstructive, and it quickly becomes apparent that they will not long mourn their elder sibling, should he shuffle off his mortal coil. (thetvdb.com)