Over time, the show became noticeably darker, with Jonathan investigating psychopaths, pimps, gangsters and corrupt policemen, who stood in stark contrast to the duplicitous suburbanites of earlier series; one story even saw Maddy being held at gunpoint by a gang member who was only just disarmed thanks to a card trick Jonathan had picked up recently. The 2009 special contained a hybrid of elements from earlier and later series, with the lethal engineering element, somewhat reminiscent of "Mother Redcap", and the torture and murder of a young woman as she is held dangling by a rope in the middle of a room. This theme continued on in "The Judas Tree" with a murderer being killed and her accomplice then being framed for the crime.