Sezon 16
Bölümler
1 The Great Bear 5 Oca 1972 2 X-Ray Stars 2 Şub 1972 3 Mars - A Dynamic World 1 Mar 1972 4 What Do You Want to Know? 27 Mar 1972 5 Fifteenth Anniversary 12 Nis 1972 6 The Tenth Planet? 24 May 1972 7 Midsummer and Megaliths 21 Haz 1972 8 Jupiter - The Colossal Planet 19 Tem 1972 9 The Andromeda Galaxy 16 Ağu 1972 10 An Exploded Planet? 18 Eyl 1972 11 Mars 2 Eki 1972 12 Collapsing Stars 30 Eki 1972 13 Tycho's Star 4 Ara 1972