A Study In Angels (WhoLock Crossover)
London, England. In the 21st Century, anything can happen. A UFO can crash on the side of Big Ben, a 1960's police box can fly across the city, a salt shaker-looking thing can exterminate you to oblivion...you get the picture.
When people start disappearing out of nowhere, it is up to Sherlock Holmes and John Watson, along with a new face in town, to solve this mystery.
Only, Sherlock can't figure out what is happening to these people. He would say time travel or aliens, but that's completely impossible...or is it?