When Henry Knight visits 221B Baker Street with a tale of disappearance on Dartmoor twenty years ago, Sherlock Holmes isn’t particularly interested – until he hears about the top-secret Baskerville military research facility and the footprints left on the moor by a gigantic hound.

> Pre-order the Series 2 DVD on Amazon.

The Hounds of Baskerville, the second episode of Series 2, airs at 8.30pm on Sunday 8th January 2012. To whet your appetite, here are ten hints for the episode…

» Sherlock may one day make a decent whale hunter.

» Keep an ear out for references to a not-very-good 1970s Holmes film and a Holmes story that doesn’t exist.

» A glow in the dark rabbit. Yep, you read that right.

» Baskerville Labs has a serious outbreak… of lens flare.

» Tread carefully now: the Grimpen Mire’s had an upgrade.

» Mycroft’s name is the ‘psychic paper’ of Sherlock.

» Why would a vegetarian restaurant order so much meat?

» Sherlock has a palace.

» What do you call it when you go looking for a dog? Dogging…?

» Someone’s been doing some interior decorating, with a certain character’s name.

> Buy the Series 1 DVD on Amazon.

Are you looking forward to The Hounds of Baskerville? Let us know below…