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.
2010
1965
2009
2008
2004
1991
2013
1995
2005
1989
1993
1981
1987
2007
1998
2018
2014
2016