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.

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.

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.

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 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.

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.

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