Roger Moore was doubled for almost all long shots, even when he was just walking down the street.
Early episodes included the gimmick of having Sir Roger Moore speak directly to the audience. Later, this was replaced by narration. In one early episode, an old woman guesses Templar's name. She says his name must be James Bond. Sir Roger Moore, of course, went on to play James Bond 007.
Out of all of the one hour programs from ITC, this show holds the record for producing the highest number of episodes. The total is one hundred eighteen.
Whilst putting the series together, it was decided to make the Simon Templar character more likeable than in the stories and far less violent.
In order to give the Simon Templar character a more 1940s look, Sir Roger Moore wore a hairpiece.