Deep Time

The Phaeron travelled among the stars using roads made from time and space but left only relics behind when they disappeared over a million years ago. But what actually happened to the Phaeron?
In the far future, humans discover the last Phaeron road - and the Doctor and Clara join the mission to see where it leads. Each member of the team knows exactly what they're looking for - but only the Doctor knows exactly what they'll find.
Because only the Doctor knows the true secret of the Phaeron: a secret so terrible and powerful that it must be buried in the deepest grave imaginable....

0 out of 3 (0.0%) raters say this story requires a previous story.