We find out exactly what kind of monster it is about halfway through, when the Doctor connects the dots. Turns out, this planet used to be famous for its diamonds (before they all got mined ...

Called “The Well” and written by the showrunner Russell T Davies, along with Sharma Angel-Walfall, it is gripping and eerie, featuring a monster even the Doctor ... Sky thrown off the bus ...

We find out exactly what kind of monster it is about halfway through, when the Doctor connects the dots. Turns out, this planet used to be famous for its diamonds (before they all got mined) and used ...