If Moriarty chilled your bones and Magnussen curdled your blood, “sherlock”’s Culverton Smith will stop your heart. The BBC’s Sherlock Holmes (Benedict Cumberbatch) and Doctor Watson (Martin Freeman) will return to action this January and, in the wake of the season 4 premiere, the pair will face off with their “most chilling” foe to date.

‘Sherlock’ episode 2 synopsis

Titled “The Lying Detective,” the Jan. 8 hour will stick another thorn in Sherlock’s mighty paw. Moriarty failed to lay low the consulting detective, but it appears the denizens of 212B Baker Street have no shortage of villains looking to claim their crown.

“In episode two of this new series, written by Steven Moffat, Sherlock faces perhaps the most chilling enemy of his long career: the powerful and seemingly unassailable Culverton Smith - a man with a very dark secret indeed,” the BBC announced on Friday.

Is this secret tied to Sherlock’s past? Ghosts are rising in London, and those whips of memory will come in the form of consequences.

"There are consequences to the kind of mad cap in-the-moment fun lives that Sherlock and John and Mary lead,” Moffat told the BBC.

“There are things that have happened, there are enemies that they have made, there is damage that has been done and some of that is coming back to visit them.”

As season 3 begins, Mary’s (Amanda Abbington) past will come to call...

‘Sherlock’ premiere teasers

Titled “The Six Thatchers,” the season opener will pick up in the wake of Holmes’ “Abominable Bride” revelation. Moriarty is dead and gone, but someone, somewhere, wants his legacy to torment our heroes just a little bit longer.

“One mysterious case in particular baffles Scotland Yard - but Sherlock is more interested in a seemingly trivial detail. Why is someone destroying images of the late Prime Minister Margaret Thatcher?" the BBC teased. "Is there a madman on the loose? Or is there a much darker purpose at work? Something with its roots deep in Mary Watson's past..."

Find out more when "Sherlock" returns to the BBC and PBS on Jan.

1. Click the video below to see a preview.

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