Each week , a reenactment of the murder at the stately home Arlington Grange of a visiting guest was played and , through a combination of interrogating the suspects ( of whom only the murderer could lie ) and deduction , celebrity guests had to discover who committed the murder , which of six weapons ( not usually the original six from the board game ) and in which room it was committed , whilst viewers were invited to play along at home .
Each week , a reenactment of the murder of a visiting guest at the home Arlington Grange was played .