The TARDIS arrives in an underwater base being haunted by actual ghosts and the Doctor is determined to figure out why before they kill each and every crewmember one by one. Will the Doctor manage to get to the bottom of it in time? What do the ghosts have to do with a strange alien vessel on board? Why is Clara acting so reckless? Find out in the latest episode of The Doctor’s Companion! And remember, BEWARE OF SPOILERS!
NEXT: “Before the Flood”!!