The TARDIS arrives on Earth in a new ice age. The travellers make their way into a base where scientists, commanded by Leader Clent, are using an ioniser device to combat the advance of a glacier.
Patrick Troughton
Frazer Hines
Deborah Watling
Peter Barkworth
Peter Sallis
Score: 7.9
Score: 8.0
Score: 8.1
Score: 6.2
Score: 7.1
Score: 6.9
Score: 6.3
Score: 6.4
