We know little about Sherlock and Mycroft's spiky relationship, but there's one theory that could help explain it a little better. Sherlock once worked for him as a secret agent.
It's easy to guess that Mycroft is the head of the British secret service, so perhaps he once hired his baby brother as one of his top agents.
There have been clues pointing towards a third Holmes brother, so maybe he was also an agent but had a rather nasty death on the job.
This terrible event could have sent Sherlock a bit doolally, forcing him to quit the gig and eventually become a private detective, causing a bit of a rift between the two remaining siblings.
This would explain just how Sherlock also has quite the skills when it comes to kicking ass and infiltrating a terrorist gang and all that.
credit; digitalspy.com
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Sherlock Theories
Hayran Kurguhere to give you all the great theories in one place to avoid endless Google searches. Notice: I do not own any of these theories of the words they're written in unless stated otherwise. I also do not believe all of these, these are all here for int...
