SherlockSherlock may have solved the case of the "Hounds of Baskerville," but there's a new hound on the scene to confound him.

BBC One shared the first photo from "Sherlock" season 4 on Twitter, and it shows Sherlock with a new four-legged friend. Watson had better watch out.

The dog is a blood hound, and Sherlock (Benedict Cumberbatch) appears to be pointing at something for the dog to see or chase down. Watson (Martin Freeman) is not pictured.

The first look comes just a day after the Christmas special "Sherlock: The Abominable Bride" nabbed six Emmy nominations, including one for TV movie and one for Cumberbatch as lead actor in a limited series.

Not much is known about season 4. It'll run three episodes, as usual. Toby Jones has joined the cast as a new villain, and there's been speculation that Watson and Mary will contend with parenthood.

Co-creator Steven Moffat teased, "Ghosts of the past are rising in the lives of Sherlock Holmes and John Watson and terror and tragedy are looming. This is the story we've been telling from the beginning and it's about to reach its climax."

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