Loki: "Doctor, there are more coming. My magic can only go so far."
Doctor: “That is why we need to pick up a pair of friends of mine. One of them is almost as brilliant as me and should be able to help us with little problem quite quickly.”
((The Doctor and Loki are trying to take out a hive of Weeping Angels, but they are being over run. This calls for a genius and who better then Sherlock Holmes.))