Writer Mark Gatiss has promised that his upcoming episode of Sherlock will be big on scares.

Gatiss is penning the second episode of the second series, The Hounds Of Baskerville, an adaption of Arthur Conan Doyle’s most famous Sherlock novel.

“There’s a big difference between the three episodes this year,” Gatiss told GQ Magazine, “And, of course, you can’t do Sherlock without admitting that people get killed.

“For me, The Hound Of The Baskervilles is one of the great horror stories that never quite delivers on its horror. So we had a chance to go for it!”

The show is expected to return to BBC1 in the New Year.