What's new in science, technology and medicine. The science behind crime-fighting is featured in tonight's special programme.
Surveillance cameras are everywhere and have recently provided vital evidence in some high-profile cases. The new-generation cameras can automatically lock on to and track an individual suspect. From the scene of a crime, there's a report on the latest forensic equipment which can bring to light previously invisible evidence. And why has a Dorset police sergeant developed a new photo-fit system to help witnesses identify cars? Plus how the everyday human ability to remember faces could lead to security codes that are virtually uncrackable - and unforgettable. With Carmen Pryce ,
Judith Hann , Howard Stableford and Kate Bellingham. ProducerNigelLevy Editor Dana Purvis
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