Sezon 20
Bölümler
1 The Changing Face of Mars 21 Oca 1976 2 The Pole Star 18 Şub 1976 3 Black Holes in Space 18 Mar 1976 4 The Rings of Saturn 21 Nis 1976 5 The Sun and the Earth 20 May 1976 6 Neutron Stars 14 Haz 1976 7 Viking to Mars 15 Tem 1976 8 Viking on Mars 11 Ağu 1976 9 How Far Can You See? 9 Eyl 1976 10 Viking - The End of the Beginning 28 Eyl 1976 11 A New Look from Old Greenwich 28 Eki 1976 12 Quasars - the Remotest Objects in the Universe? 24 Kas 1976 13 The Evening Star 15 Ara 1976