The TARDIS arrives on 21st Century Earth where all long distance journeys are made instantaneously by T-Mat. But aliens have invaded the T-Mat relay station on the Moon... Show more
With the commerce of the world grinding to a halt, the Doctor, Jamie and Zoe agree to investigate and set off for the Moon in an old fashioned rocket. Show more
On the Moon, the Doctor is captured by the Ice Warriors and learns that they intend to use T-Mat to spread a deadly fungus across the world. Show more
As the Martian fungus begins to spread, Zoe, Jamie and Gia Kelly attempt to strike back against Slaar and his occupying force of Ice Warriors.
An Ice Warrior invasion fleet is on its way to the Moon. Back on Earth, the Doctor devises a plan to destroy the Martian fungus. Show more
Returning to the Moonbase, the Doctor confronts Slaar and the remaining Ice Warriors and must find a way of deflecting the invasion fleet that is heading towards them.