A U.S Customs official uncovers a massive money laundering scheme involving Pablo Escobar.

Actor William Hartnell felt trapped by a succession of hard-man roles while wannabe producer Verity Lambert was frustrated by the TV industry's glass ceiling. Both of them were to find unlikely hope and unexpected challenges in the form of a Saturday tea-time drama. Allied with a team of unusual but brilliant people, they went on to create the longest running science fiction series ever made.