'Do-it-yourself science presented by Carol Mather and Professor Ian FeUs.
Professor David Phillips from the Royal Institution explains how his work with lasers and dyes might lead to a treatment for some forms of cancer. He also gets the colours out of Smarties and cures a jaundiced glass baby (what?) ...
Ian proves that the sky isn't really blue, and Carol takes part in the first of a series of experiments designed to show whether humans have a genuine sense of direction. Dr Robin Baker of Manchester University is hoping that many people will try the experiment and write to him with the results. Assistant producers
GEORGE AUCKLAND. DEBORAH COHEN Producer PATRICK TITLEY (e)