Don't forget all the first, second & third series were wiped from their 405-line videotapes. Whilst Series 2&3 exist transfered to 16mm telerecordings(kinescopes) only two full episodes exist on 16mm from Series 1 & 15-21mins from the first episode. The Series 1 material appears to have been found in America. In Australia we must have got the 16mm telerecordings as we never had the 405-line system here. I remember a lot of British TV series(BBC) that had a regal logo and the line Telerecording in the late 1950s. One wonders what ever happened to these films.