BBC has probably excited and confused more than a few viewers with this promo that brings together "Sherlock's" Benedict Cumberbatch and Martin Freeman, "Luther's" Idris Elba and "The Fall's" Gillian Anderson.

The TV spot edits together footage from each of the series to assemble Sherlock Holmes, John Watson, John Luther and Stella Gibson at a crime scene, where there's more than one surprise waiting fFallor them.

A promo for the BBC's upcoming drama lineup, the spot ends with a cliffhanger, suggesting we could see more of this unlikely team-up.