US TV
The drama is a modern-day reworking of the Jekyll and Hyde story focusing on Justin/Clyde (Lloyd Owen), a partially paralysed forensic psychiatrist with a charismatic criminal as his alter ego.
The Battlestar Galactica actress will play Mason Wicks, a psychiatrist working with the police department.
Morgan Turner has also joined the cast as Justin's daughter Emily.
Invasion creator Shaun Cassidy wrote the Inseparable pilot.
More: Tricia Helfer, US TV
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2012-13 Season
John Stamos to star in 'Little Brother'The former Full House actor will star in the comedy pilot Little Brother.
US TV Interviews
'Celebrity Apprentice' Debbie Gibson Q&ADebbie Gibson opens up about her Celebrity Apprentice experience.
US TV Ratings
'Blue Bloods', 'Grimm' rise on FridayCBS beats ABC to win Friday night's ratings battle, thanks to Blue Bloods.
