[s1e8] The Long Fuse -

Watson is determined to find Sherlock a permanent "sponsor" as her time with him is supposedly nearing its end.

To eliminate the blackmailer, she built a pipe bomb intended to frame eco-terrorists. When it failed to go off, she improvised by killing Sing herself and hiding his body inside a wall of the office. [S1E8] The Long Fuse

Here is a blog post covering the key themes and moments of Elementary S1E8, "The Long Fuse." Case File: The Bomb That Waited Four Years Watson is determined to find Sherlock a permanent