Horizon — 1974

E01 A Matter of Self-Defense 07 Jan 1974 E02 Bird Brain - The Mystery of Bird Navigation 14 Jan 1974 E03 Never Too Late to Learn 21 Jan 1974 E04 The Great Fish Hunt 28 Jan 1974 E05 Pedal Power 04 Feb 1974 E06 The Writing on the Wall 11 Feb 1974 E07 Where Did the Colorado Go? 18 Feb 1974 E08 The Future Goes Boom 04 Mar 1974 E09 Fusion: The Energy Promise 11 Mar 1974 E10 The First Ten Years 22 Apr 1974 E11 This Yankee Dodge Beats Mesmerism Hollow 29 Apr 1974 E12 The Hunting of the Quark 06 May 1974 E13 A Noah's Ark for Europe 13 May 1974 E14 Bridges: When It Comes to the Crunch 03 Jun 1974 E15 Search for Life 10 Jun 1974 E16 The Secrets of Sleep 10 Jun 1974 E17 Who Needs Skills? 24 Jun 1974 E18 Hills of Promise 01 Jul 1974 E19 The Race for the Double Helix 08 Jul 1974 E20 The Immigrant Doctors 15 Jul 1974 E21 Mines, Minerals and Men 22 Jul 1974 E22 What Price Steak? 29 Jul 1974 E23 Listen and Be Loyal 05 Aug 1974 E24 Adam or Eve? 12 Aug 1974 E25 An Unholy Scramble 02 Sep 1974 E26 Do as You Are Told 28 Oct 1974 E27 The First Signs of Washoe 04 Nov 1974 E28 The Other Way 11 Nov 1974 E29 The Greatest Advance Since the Wheel? 25 Nov 1974 E30 Joey 09 Dec 1974 E31 The Neglected Harvest 16 Dec 1974 E32 How on Earth Did They Do That? 23 Dec 1974 E33 The Lysenko Affair 30 Dec 1974