Exec producer Sue Vertue announced the first major piece of series three casting news yesterday (July 29), revealing that Dane Lars Mikkelsen would be joining the show as dastardly villain Charles Augustus Magnussen.
But what do we know about Magnussen? And for anyone who doesn't know their Forbrydelsen from their Borgen, who is Mikkelsen? Digital Spy has all the details that every Sherlockology fanatic needs to know.
1. Lars Dittman Mikkelsen was born on May 6, 1964 in Denmark.
He graduated from the National Theatre School of Denmark in 1995 and he is married to actress Anette Støvelbæk.
2. Oh. And did we mention he has quite a famous brother called Mads?
Surely a Benedict Cumberbatch/Hugh Dancy, Sherlock/Hannibal crossover episode beckons. Sherlibal? Hannilock?
3. He is best known for playing for the role of Troels Hartmann in the original Danish version of The Killing.
And you can read a chat Digital Spy had with Mikkelsen about his role in the Nordic Noir murder mystery right here.
4. Who is Charles Augustus Magnussen?
There is no character by that name in the original Conan Doyle canon, but it doesn't take a super sleuth to figure out who he is based on. Charles Augustus Milverton, who was billed as the "king of the blackmailers", appears to be the inspiration and he also fits in with the show's timeline as he appeared in the books after Holmes's fake death.
5. So who was Charles Augustus Milverton?
He may not be as well known a figure in the Sherlock Holmes canon as Moriarty or Moran, but don't underestimate Milverton as a villain. Holmes famously described the villain as having similar qualities to a "slithery, gliding, venomous" serpent.
"I've had to do with 50 murderers in my career, but the worst of them never gave me the repulsion which I have for this fellow."
6. Milverton has appeared in previous TV adaptations.
He was played by Barry Jones in the BBC's 1965 version of Sherlock Holmes with Douglas Wilmer in the title role. In the Jeremy Brett series, Milverton appeared in the 1992 feature-length episode 'The Master Blackmailer' and was played by Robert Hardy.
7. Milverton was actually based on a real life art dealer.
Art dealer and alleged blackmailer Charles Augustus Howell was the basis for Arthur Conan Doyle's villain. He was described by poet Algernon Charles Swinburne as "the vilest wretch I ever came across". Delightful.
8. Mikkelsen is quite a big deal in his home country.
We should probably all be bowing/curtseying for the Sherlock star. He was knighted by the Danish queen Margrethe II and given the Knight's Cross back in 2011.
9. Lars's career could have taken a very different route.
He studied biology at the University of Copenhagen! Thankfully for us, he wasn't a very big fan of the world of science. He said in an interview with the Leeds Student: "I wouldn't go back to it. I'd still be studying, drinking and just being miserable. I would be the worst biologist in the world!"
10. Lars is a big fan of classic British TV.
Sherlock must be a dream role for the Dane as he's a big follower of classic British murder mysteries such as Frost, Poirot and Miss Marple.