Lestrade is comitted to a sanitarium following the brutal murder of his wife.
Whilst there, he hallucinates all three seasons of Sherlock, with the characters being based off of people he knew in real life. Some examples could be -
Molly: His wife's awkward friend, who he may or may not have history with.
Sherlock and Jim: Everyone knows that couple that can't get enough of each other one moment and want to kill each other the next - same idea, except sometimes they actaully try to carry through.
Gen or light-Moriarty/Sherlock, "Sherlock" is all Lestrade's imagination
Whilst there, he hallucinates all three seasons of Sherlock, with the characters being based off of people he knew in real life. Some examples could be -
Molly: His wife's awkward friend, who he may or may not have history with.
Sherlock and Jim: Everyone knows that couple that can't get enough of each other one moment and want to kill each other the next - same idea, except sometimes they actaully try to carry through.