Thats the throw in of setup thatElementaryusually has success with, and Miss Taken is no exception.

That would explain the pepper spray and intimacy of the crime.

Thus, the first person to question must be Underhills wife, Sheila.

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Credit: Michael Parmelee/CBS

Sherlock quickly rules out Sheila though, as she has an alibi for the night her husband was murdered.

Meanwhile, Joan confronts her father about the book that he wrote.

She orders him to call his publisher and get the books recalled.

Back at the brownstone, Sherlock fills in Watson on all the details of the case.

There is one mysterious case left though, one that wasnt even on anyones radar in relation to Underhill.

Sherlock, Watson, and Captain Gregson head over to the Davenports house to question them.

Still, they get a very brief word with her when she passes through the room.

Its after that moment when things start to getreallyinteresting.

Sherlock drops a bomb: that girlis notMina Davenport.

Still, Gregson isnt totally convinced, and her parents are going to be hard to convince, too.

That doesnt stop Sherlock from questioning Mina while her parents are talking to Gregson and Watson.

Its charming and funny, and just the right amount of cheeky.

It also leads to Watson forgiving her father, after reading his proposed sequel, and mending that bridge.

Shortly thereafter, Mina shows up at the brownstone and asks to speak with Sherlock and Joan.

Plus, she knows who did.

Its crazy, but it could be true.

As Cassie puts it, she may have done something bad, but what Minas parents did is worse.

Sherlock, to his credit, doesnt believe her story for a second.

Sherlock then reveals to Watson that one of the listening devices is actually a flash-bang.

While searching the house they find some blood on the brake pedal of a car.

Still, nothing is matching up.

for prove that Richard didnt kill Underhill, they need to prove that Cassie isnt Mina.

It worked for a while, but eventually the ruse comes crumbling down.

Sherlock and Watson reunite Mina with her parents and put Cassie behind bars.

Whats interesting though is that Miss Taken doesnt end on a positive note.

Rather, Sherlock still doesnt have enough evidence to prove that Cassie killed Underhill.

Furthermore, when he visits her in a holding cell, she basically laughs off the charges.