Which episode opens the second series of BBC Sherlock?

The second series of BBC Sherlock opens with “A Scandal in Belgravia.” It was the first episode of series two and was broadcast by BBC One on 1 January 2012.

The episode continues directly from the cliffhanger ending of “The Great Game,” the final episode of series one. Sherlock and John become involved with Irene Adler, a highly intelligent and dangerous woman who possesses compromising photographs connected to the British royal family. Her encrypted mobile phone becomes the focus of the case.

The title and central premise draw on Arthur Conan Doyle’s short story “A Scandal in Bohemia.” The modern adaptation changes the setting and circumstances while preserving the story’s interest in Irene Adler’s intelligence and her ability to outmanoeuvre Holmes. The other options belong to different points in the series: “The Empty Hearse” begins series three, “The Reichenbach Fall” ends series two, and “His Last Vow” is a later series-three episode.