Sezon 12
Bölümler
1 Home-Built Observatories 5 Oca 1968 2 Calendars of Other Worlds 2 Şub 1968 3 The New Planetarium 1 Mar 1968 4 Black Clouds in the Galaxy 29 Mar 1968 5 Flights of Space Fancy 26 Nis 1968 6 A Close Pass by Icarus 24 May 1968 7 The Unquiet Sun 21 Haz 1968 8 Pulsars 19 Tem 1968 9 The Structure of the Moon 16 Ağu 1968 10 The Siberian Eclipse of the Sun 9 Eyl 1968 11 The Eclipse of the Sun 7 Eki 1968 12 The 'Clocks' of Space 4 Kas 1968 13 Venus, The Hot Planet 2 Ara 1968 14 The Moon and the Earth 30 Ara 1968