In the pilot , the boys knew Fagin already , but in the series , Fagin met them and their knowledge of each other developed very quickly .
Fagin knew boys knowledge was not as if Fagin had known boys for long .
In the pilot , the boys knew Fagin already , but in the series , Fagin met them and their knowledge of each other developed very quickly , although he knew them it was not as if he had known them for long .