Paul Temple isn't a detective in any recognised sense. Deduction didn't take place. Events simply occurred, people were met and spoken to, and murder attempts were survived. Then, in the final episode, Temple would arrange a drinks party, or similar, at which the villain would be revealed. Finally, Paul, Steve and Sir Graham Forbes would hold a post mortem, which would usually leave listeners no wiser as to why certain events in the serial had taken place, which of them had been red herrings and which had been unclarified clues.