The Boys from Brazil

This is such a classic piece of mystery drama, it's inconceivable that it's not better known. A late seventies film starring the cream of cinema from 20 years earlier, this follows a Nazi plot (in the present day) and the efforts of a Nazi hunter to put the pieces together. The elements include a number of apparently unrelated children, a decades-old plot, a series of murders, Josef Mengele, and a short appearance by one `Steven' Guttenberg, in an early film role. When you finally realise what has been going on, it ups the stakes dramatically. Well worth seeking out.