So PBS said that they will be airing Series 3 of Sherlock on
“The Empty Hearse” – Sunday, January 19, 2014 at 10pm on MASTERPIECE
“The Sign of Three” – Sunday, January 26, 2014 at 10pm on MASTERPIECE
“His Last Vow” – Sunday, February 2, 2014 at 10pm on MASTERPIECE
source to this here: http://www.pbs.org/wgbh/masterpiece/programs/features/news/sherlock-season-3-premieres-jan-19-2014
But what this means is that Sherlock will probably air in the UK sooner then January 19!