Sanctuary - Season 3 - Eps 9: Vigilante
Will takes command of the Sanctuary while Magnus and Druitt search for a critical artifact in London. Knowing that Magnus's only hope for a cure lies in the secret subterranean city, Will ignores her warnings and releases Adam-Hyde in the hope that he will lead them to an access point for Hollow Earth.
About Sanctuary

Title: Sanctuary
First Air Date: 2008-10-03
Last Air Date: 2011-12-30
Status: Ended
Rating: 7.2/10 (from 261 votes)
Language: EN
Seasons: 5
Total Episodes: 59
Network: Syfy
Genres: Action & Adventure, Sci-Fi & Fantasy
Production Companies: Syfy, Tricon Films & Television
Synopsis
The adventures of the beautiful, enigmatic and always surprising Dr. Helen Magnus, a brilliant scientist who holds the secrets of a clandestine population called Abnormals—a group of strange and sometimes terrifying beings that hide among humans. Magnus seeks to protect this threatened phenomena as well as unlock the mysteries behind their existence.
Cast

Amanda Tapping
Dr. Helen Magnus

Robin Dunne
Dr. Will Zimmerman

Christopher Heyerdahl
John Druitt / Bigfoot

Ryan Robbins
Henry Foss