The TARDIS lands in a space museum on Earth in the late 21st century, where the Second Doctor, Jamie and Zoe learn that contact has been lost between Earth and the Moon. In this era, instant travel — T-Mat — has revolutionised the Earth. Its people have lost interest in space travel. The Doctor and his companions travel to the Moon in an old-style rocket and reach the Moonbase, control centre for T-Mat, only to find a squad of Ice Warriors have commandeered the base and plan to use the T-Mat network to their advantage.
Patrick Troughton
Frazer Hines
Wendy Padbury
Ronald Leigh-Hunt
Louise Pajo
Philip Ray
Terry Scully
Ric Felgate
Harry Towb
Christopher Coll
Martin Cort
Hugh Morton
Derrick Slater
John Witty
Alan Bennion
Graham Leaman
Steve Peters
Tony Harwood
Sonny Caldinez