This was one of the greatest shows I watched when growing up in England in those years. I can well remember Laurie's face on the screen when he introduced the show. What a total let down to discover that every single one of the 29 episodes are missing! Is there anyone of whom could elaborate on this? Were they burned, or destroyed in some way, or did they decay over time? This was an excellent TV show of which could never be reproduced today. Filmed in black and white, there was a spookiness, a quality that was obtained by shooting in black and white that had an effect that is not possible when shooting film in color. In my opinion, this series was a landmark in British TV.