His secretary's voice came over the 'intercom', telling him that he had a visitor.
I heard my name called on the 'intercom'.
(..) WOMAN: What's the point of booking an appointment if they can't stick to it? Um, what's going on? That new doctor you hired, he hasn't buzzed the intercom for ages. Let me go and have a word. Excuse me. Sorry. KNOCKS ON DOOR John? John? (..)2010 TvShow: Sherlock Title: The Blind Banker Season: 1 Episode 2