The BBC has released a short teaser for the upcoming one-off, Victorian-set Sherlock Special.
Much like promotion for Doctor Who, writer Steven Moffat and the BBC know how to drip-feed teasers to fans of the series without revealing much at all.
The special will once again star Benedict Cumberbatch, Martin Freeman and Una Stubbs as Sherlock Holmes, John Watson and Mrs Hudson, which you can watch in a preview clip here.
Louise Brealey and Rupert Graves will also be reprising their roles in the special, which is due to air over Christmas.
A longer trailer will be revealed on BBC One tomorrow (7 October) at 9pm.
Watch the teaser below…