In anticipation of the second season, which consists of three 90-minute episodes, PBS is offering the first seven minutes of the first installment free on their Facebook page.
"A Scandal in Belgravia," directed by Paul McGuigan (of "Gangster No. 1" and "Lucky Number Slevin"), is based on the story "A Scandal in Bohemia." It will feature Irene Adler, the most memorable female character in the Holmes canon, here played by Lara Pulver and updated into "a ruthless and brilliant dominatrix."
Watch the seven-minute preview here.