Kill the Moon (S08E07)

Set in a not-so-distant future, The Doctor and Clara land on a failing shuttle en route to the Moon for a perilous mission. Upon crashing onto the lunar surface, they discover a desolate mining facility littered with mutilated bodies and menacing, spider-like creatures lurking in the shadows. As they navigate through the eerie surroundings, they are confronted with a harrowing moral choice that could have dire consequences for humanity.