The Bells of Saint John

Premise: The search for Clara brings the Doctor to London, 2013, where something deadly is waiting in the Wi-Fi.

Notes: The episode featured new London landmark, the Shard, which was opened to the public on the first of February, just under two months before the episode aired. Clara's book, Summer Falls, was written by Amelia Williams, a reference to the Doctor's previous companion Amy Pond who's married name was Williams. The title is a reference to the St. John Ambulance logo on the TARDIS exterior. It was originally of real life police boxes to remind the public that police officers were trained in first aid by members of the St. John Ambulance Association.

Verdict: A great urban thriller with great performances from the two leads. The villain is suitably menacing (a rare commodity in Moffat's run) and the whole production is simply a fun and exciting ride 9/10