Horizon — 1977

E01 A Smile for a Crocodile 07 Jan 1977 E02 The Pill for the People 14 Jan 1977 E03 The Ape That Stood Up 21 Jan 1977 E04 The Human Animal 04 Feb 1977 E05 The Guinea Pig and the Law 18 Feb 1977 E06 Hunters of the Seal 25 Feb 1977 E07 The Red Planet 04 Mar 1977 E08 One of Nature's Hotels 11 Mar 1977 E09 Dawn of the Solar Age 18 Mar 1977 E10 Genetic Roulette 01 Apr 1977 E11 The Amazing Doctor Newton 15 Jul 1977 E12 The Trouble with Medicine 22 Jul 1977 E13 Silent Speech 29 Jul 1977 E14 The Green Machine 05 Aug 1977 E15 The River That Came Clean 02 Sep 1977 E16 Blueprints in the Bloodstream 09 Sep 1977 E17 40 Years of Murder 16 Sep 1977 E18 The Cry for Help 30 Sep 1977 E19 The Sunspot Mystery 07 Oct 1977 E20 The Rhine's Revenge 21 Oct 1977 E21 Icarus' Children 02 Dec 1977 E22 The Healing Nightmare 09 Dec 1977 E23 The Great Wine Revolution 23 Dec 1977