Did Holmes go all the way to the dark side?
That was addressed on Elementary Season 6 Episode 9 when he decided to help Alfredo, his former sobriety sponsor, to make things right in a case to save his brother.
Meanwhile, Holmes and Watson tried to find out the truth about a biology professor who was working on a secret genetics project prior to being killed.
The case pushed them towards a side of crime they never thought they would have to deal with.
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Paul Dailly is the Associate Editor for TV Fanatic. Follow him on Twitter.