Even in today's world of science and certainties, mysteries remain...and men and women are fascinated by them. The need to understand has compelled us to probe both outer and inner space in search of knowledge, but new answers seem always to lead to new questions.

The classic series In Search of attempts to unravel many of the world's greatest mysteries, past and present, which capture and intrigue our imagination.

IN SEARCH OF THE ANGEL OF DEATH

Nazi hunter Simon Wiesenthal tracks infamous war criminal Joseph Mengele.