Mancini's Family Restaurant was a restaurant in London during the late Victorian era. It was used as a front by the Half-Face Man, who had his Clockwork Droids masquerade as diners and harvest the organs of human visitors. Both the newly regenerated Twelfth Doctor and Clara Oswald were led here via a hint in an issue of The Times newspaper (TV: Deep Breath) that was left by Missy, (TV: Death in Heaven) which they deduced to be intent on keeping the two of them together.
The restaurant served as an "escape pod" of sorts to the SS Marie Antoinette buried deep underneath. The restaurant could be lifted into the sky by a hot air balloon made of human skin. It was from here that the Half-Face Man fell and met his end. (TV: Deep Breath)
Behind the scenes
The stage directions from the script of Deep Breath referred to this establishment as "a pleasant, middle-sized restaurant."