In the distant future, the Doctor, Sarah and Harry find a space station preserving the future of mankind. But the insect Wirrn have got there first...
Tom Baker
Elisabeth Sladen
Ian Marter
Wendy Williams
Kenton Moore
Score: 6.6
Score: 6.3
Score: 6.0
Score: 5.8
Score: 7.6
Score: 6.9
Score: 6.3
Score: 3.5
