What is sherlock 2 2?

There are several possible interpretations of what "Sherlock 2 2" might refer to, but here are two possibilities:

1. If "Sherlock 2 2" refers to the second episode of the second series of the BBC TV show "Sherlock," here is some information:

Title: "The Hounds of Baskerville" Airdate: January 8, 2012 Synopsis: Sherlock and John investigate a mysterious conspiracy involving a top-secret military project and a legendary terror that haunts the moors. Their search leads them to the heart of the Ministry of Defence and a confrontation with a mad scientist who has a penchant for playing God with human lives.

2. If "Sherlock 2 2" refers to something else entirely, please provide more context or clarification so that I can give a more accurate answer.