S11, E26: The Doctor takes the blue crystal and returns to Metebelis 3 where he must face the spider ruler, the Great One. However, it is this encounter that triggers his third regeneration.
Starring Kevin Lindsay, John Kane
S11, E26: The Doctor takes the blue crystal and returns to Metebelis 3 where he must face the spider ruler, the Great One. However, it is this encounter that triggers his third regeneration.