Sezon 1
Bölümler
1 The Making Of A Natural History Film 3 Mar 1974 2 Where Did the Colorado Go? 10 Mar 1974 3 Whales, Dolphins, and Men 17 Mar 1974 4 The Search For Life 24 Mar 1974 5 Last of the Cuiva 31 Mar 1974 6 Strange Sleep 7 Nis 1974 7 The Crab Nebula 14 Nis 1974 8 Bird Brain: The Mystery of Bird Navigation 21 Nis 1974 9 Are You Doing This for Me, Doctor? 28 Nis 1974 10 The First Signs Of Washoe 5 May 1974 11 The Case of the Midwife Toad 12 May 1974 12 Fusion: The Energy of Promise 19 May 1974 13 The Mystery Of The Anasazi 26 May 1974