Why is this a reservation?
I think it's really important to show this, as Sam Tyler has been working in a much more modern environment with the uses of DNA and fingerprinting, and other forensics which he has been able to use back in 1974...methods which Gene 'tut tuts' all the time, but are proven to work. It is worthwhile knowing that 30 odd years ago too many crooks got away with it due to lack of knowledge and 'gung ho' attitudes displayed by Gene.
It is also great to see Sam use Annie in a much more productive way than was used in the early part of the 70's..WPCs didn't have any clout! I like the idea of Annie becoming a well respected detective if the series spin off emerges...