The current series of Doctor Who continues tonight at 7:30pm on BBC One and BBC One HD, read on for the synopsis to the fourth episode:
LISTEN - by Steven Moffat
When ghosts of past and future crowd into their lives, the Doctor and Clara are thrown into an adventure that takes them to the very end of the universe. What happens when the Doctor is alone? And what scares the grand old man of Time and Space? Listen!
The episode will be available to watch on BBC iPlayer soon after broadcast, Doctor Who Extra will also be available to watch on BBC Red Button and online. The series continues next week with Time Heist - more information coming then.