The TARDIS has gone as far into the future as it is allowed to by Time Lord law. They look on the screen and see the planet Frontios which happens to be an Earth colony that houses some of the last humans from Earth before it was destroyed. Tegan wants to go down to the planet and see them but The Doctor is insistent that they do not go down there and interfere with their development. But a meteor storm appears to have happened and the TARDIS appears to have gotten caught in a gravitational pull and is heading to the planet.
It appears that Frontios has been under threat of meteors for quite a while now and it seems to be having its toll as the population has thinned out and for some reason people have been disappearing into the ground. The Doctor and his companions decide to help with the wounded and get involved but it comes at a price. During the next wave of meteor storms the TARDIS is destroyed and all that is left is the hat stand. The Doctor decides to explore the underground passage ways that exist under the settlement along with Turlough, Tegan, Norna and Brazen.
What they find down there fills Turlough with fright as his mind snaps at a memory of great pain during his planets past that seems to affect him in a bad way. What he sees is the Tractators. The Tractators are a race of aliens that burrow the planet out to a certain radius so they can focus their gravity powers and drive the planet through space. Turlough remembers this as not only can they do this but they also need the minds of humans to operate their machines which in turns makes the humans zombie like and eventually kills them. So it is up to The Doctor to save Frontios from the Tractators and to also somehow trick them into putting all the pieces of the TARDIS back together again.
So join us Friday July 26th at 7:15 PM EDT USA/00:15 UK for Frontios