Threshold (Series) Season 1, Disc 1 - 2005 Carla Gugino (Dr. Caffrey), Brian Van Holt (Sean Cavennaugh), Brent Spiner (Dr. Fenway), Rob Benedict (Lucas Pegg), Peter Dinklage (Arthur Ramsey), Charles... some violence and blood, and no sex (implied or otherwise) or nudity. Worth watching if you are a true sci-fi/alien fan otherwise, take a pass on this one. Season 1 Disc 2 coming soon!