Horizon — 1991

E01 Sudden Death 07 Jan 1991 E02 Keen as Mustard 14 Jan 1991 E03 Smokers Can Harm Your Health 21 Jan 1991 E04 Coming In from the Cold 28 Jan 1991 E05 Small Problems with the Mirror 04 Feb 1991 E06 Two Weeks to Save the Earth 10 Feb 1991 E07 California Dreaming 11 Feb 1991 E08 The Day the Earth Melted 25 Feb 1991 E09 The Curse of Karash 25 Feb 1991 E10 Playing at Noah 04 Mar 1991 E11 Cashing in on Paradise 11 Mar 1991 E12 The Terracotta Time Machine 18 Mar 1991 E13 Measuring the Roof of the World 25 Mar 1991 E14 The First Americans 15 Apr 1991 E15 Inside Chernobyl's Sarcophagus 22 Apr 1991 E16 Colonising Cyberspace 29 Apr 1991 E17 Emerging Viruses 13 May 1991 E18 Camelford - A Bitter Aftertaste 20 May 1991 E19 Of Big Bangs, Stick Men and Galactic Holes 03 Jun 1991 E20 Food For Thought 10 Jun 1991 E21 The Long Road to the West 17 Jun 1991 E22 Half Hearted About Semi-Skimmed 24 Jun 1991 E23 T-Rex Exposed 01 Jul 1991