Whose murder rocked Holmes and Watson's inner circle?
That was the big question on Elementary Season 6 Episode 7 when it emerged that someone close to them could be involved.
Meanwhile, Holmes continued to struggle in the aftermath of his big neurological woes.
Also, his sobriety was put on the line when the killer tried to play a game of cat and mouse with him.
It prompted Holmes to go a little too far when his back was against a wall.
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Paul Dailly is a staff writer for TV Fanatic. Follow him on Twitter.