Although made in the late 1960s/early 1970s, mainly in black & white, this series is well worth watching. Too many people insist on widescreen colour and so miss these gems from the past and much lamented golden age of television. I find that the black and white picture (which is of generally good quality)actually adds to the period atmosphere and nostalgia. The stories, which are set in the 1920s, are absorbing and Hugh Burden is a fine actor. Mr Reeder may seem mild mannered and unassuming but is anything but and can show a tough side when needed. He always gets his man, although his corpulent & monocoled boss, Sir Jason Toovey, invariably claims the credit. There are also many well known faces, for example John Le Mesurier (Dad's Army's Sergeant Wilson)as a rather sinister character! And a catchy signature tune too! I recommend this series wholeheartedly. Buy it.