The TARDIS materialises on Earth during the second ice age. At the Britannicus Base, like bases around the world, a computer and an ioniser device are used to keep the ice flows at bay.
A giant creature has been discovered buried in the ice, termed an Ice Warrior by one of the scientists, and it is brought into the base. It thaws, and the creature reveals itself to be Varga, commander of a Martian spacecraft that landed on Earth centuries ago and was entombed in the ice.
More Ice Warriors are revived. With Mars now dead they plan to take over Earth, and with Earth in the grip of a second ice age the conditions are perfect for colonisation.
The ioniser cannot be used for fear of exploding the Ice Warrior's ships engines. The computer, to which the base are dependent, can offer no advice in the situation. One of the scientists who supports the Doctor decides to risk using the ioniser, and the resulting explosion is only minor, only destroying the Ice Warriors and their ship, and keeping the ice at bay.
Regular castJamie McCrimmon: Frazer Hines; Victoria Waterfield: Deborah Watling;
Guest castLeader Clent: Peter Barkworth; Senior Control Technician Jan Garrett: Wendy Gifford; Elric Penley: Peter Sallis; Commander Varga: Bernard Bresslaw; Stor: Angus Lennie (1-4); Chief Scientist Arden: George Waring (1-3); Securty Sergeant Walters: Malcolm Taylor (1,5-6); Computer Voice: Roy Skelton (1-2,5); Davis: Peter Diamond (1); Zondal: Roger Jones (3-6); Rintan: Tony Harwood (3-6); Isbur: Michael Atwell (3-6); Turoc: Sonny Caldinez (3-4);
Uncredited cast: Control Room Operators: Monique Bryant, Alec Coleman, Kathy Fitzgibbon, Stan Hogan, Ann Jarvis; Technicians: Gary Dean, Frankie Dunn, James Holbrook, Donald Sinclair;
|BBC 1||180||One||Sat 11 November 1967||5:10 pm - 5:35 pm||6.7M||68th|
|BBC 1||181||Two||Sat 18 November 1967||5:25 pm - 5:50 pm||7.1M||71st|
|BBC 1||182||Three||Sat 25 November 1967||5:25 pm - 5:50 pm||7.4M||64th|
|BBC 1||183||Four||Sat 2 December 1967||5:25 pm - 5:50 pm||7.3M||63rd|
|BBC 1||184||Five||Sat 9 December 1967||5:25 pm - 5:50 pm||8.0M||44th|
|BBC 1||185||Six||Sat 16 December 1967||5:25 pm - 5:50 pm||7.5M||58th|
This programme does not have any outside filming
Ealing Television Film Studios; Lime Grove Studio D;
Bloopers and mistakes
This programme has no bloopers or mistakes. It's probably not perfect, just that they haven't been found or pointed out yet.
Notes and trivia
The story title, writer credit and episode number (with no episode prefix) are brought up over a sequence of ice crystals, accompanied by incidental music, the vocals for which are by Joanne Brown.
This programme has no other working titles, or they have not been yet been entered.