Take Jenga and Clue; place Professor Plum on top of the Jenga tower. Play Clue normally, but every time a suggestion is made and disproved, pull a block from the Jenga tower and don't replace it. Solve the crime before the tower falls!
If you become a Sherlock fan after Series 3 is out, the DVDs should still have a built in pause minimum. It's only fair.<<< Sorry, but I got seasons on DVD for Christmas, and appreciated not having that 1 year pause
Things You May (or May Not) Know About BBC Sherlock". "(A Scandal in Belgravia) Sherlock taking Irene’s pulse was not originally in the script and was improvised by Benedict Cumberbatch." <---He's a GENIUS