I've always loved detective stories and this is one of my favorites. Unfortunately, I don't remember much of it, because I was only about 6 years old when I saw this serial. I still remember the title music, which, later on I found out was the "Songbird" tune... The private-eye (Trevor eve) was perfect for the "not-normal" character, looked and acted the part well. Quite a thrilling thriller, quite and edge of the seat at the same time! I wish they would re-telecast this series once again so that I could refresh my memory... I'd give it a 9/10.