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As Jessie's nightmares grow worse, Bea accepts Dr. Whatson's job offer to investigate four kidnapped babies - and receives some unexpectedly posh help.

Broke and in trouble, Bea reluctantly partners with Jessie to find out who's stealing children's teeth. Spike spies on Watson and Sherlock Holmes.

A gruesome murder sends Bea and her crew undercover at a country estate to determine whether the killer is part of a secret paranormal society.

Jessie comes face to face with Inspector Lestrade at a crime scene, Bea plays cat and mouse with Watson, and Leo feels torn over his life at the palace.

Bea discovers more about her mother's long-ago connection to Holmes and Watson, while Billy contemplates revenge after a brutal reminder of his past.

Bea suspects a spate of stolen body parts links to an old case, Jessie approaches Sherlock about her nightmares. Leo makes a stand for his future.

After demanding the truth from Waton, Bea joins a plan to catch the Linen Man. Jessie fights her fears. Spike scrambles to keep his friends together.

As London descends into chaos, Bea and her crew head underground, where together they face untold horror in a dangerous quest to locate the rip.