"The Doctor has a secret he will take to his grave..."

Writer - Steven Moffat

Director - Saul Metzstein

Producer - Marcus Wilson



Clara - Jenna-Louise Coleman
River Song - Alex Kingston
Dr Simeon - Richard E Grant
Vastra - Neve McIntosh
Jenny - Catrin Stewart
Strax - Dan Starkey
Angie - Eve de Leon Allen
Artie - Kassius Carey Johnson
Andro - Nasi Voutsas
Fabian - David Avery
Clarence - Michael Jenn
Archie - Rab Affleck
Messenger Boy - Samuel Irvine
Young Clara - Sophie Downham
Whisper Man - Paul Kasey

Synopsis: Clara is summoned to an impossible conference call, alerting her that the deadly Whisper Men are closing in on Vastra, Jenny and Strax. Someone is kidnapping the Doctor’s friends, leading him toward the one place in all of time and space that he should never go. It’s a deadly trap that threatens to unravel his past, present and future…

Airtime: 19:00 BST (GMT+1) BBC ONE