I remember seeing a reconstruction in the early 2000s that stuck with me. It showed a young girl whose mum let her go to the Post Office(?) on her own for the first time (in broad daylight). Whilst she was walking there, she noticed a man watching and following her, so she ran up to a old woman in the street to ask her if she could pretend to be her gran. I can't remember what the old woman said or did, but the girl ended up being attacked by the man anyway.
The 80s and 90s episodes on YouTube are great , really well produced, and funny sometimes as well, due to the presenters faux pas' and the non-PC things they say. In one episode they described a suspect as "a fat ugly man".
The "Crimewatch File" episodes on YouTube are really good too , each episode was a reconstruction of how the police solved a specific case. The police work seemed very laborious before modern technology - there was one episode where a policewoman had to look through a book of 30,000 fingerprints, on the off chance that one of them matched the print of a murderer. The real police officers and detectives involved in the investigation would act in it too, and they were always terrible actors!