"Threshold" is a suspenseful super-natural thriller about a team of experts who are assembled when the U.S. Navy makes a chilling discover: an extra terrestrial craft has landed in the mid-Atlantic ocean. Dr. Molly Anne Caffrey (Carla Gugino) is a government contingency analyst whose job is to devise response plans for worst-case scenarios. In a single instant, her life changes when one of those plans - "Threshold" - is activated by Deputy National Security Advisor J.T. Baylock (Charles S. Dutton). Armed only with her hypothetical strategy to address the appearance of aliens on earth, Caffrey now finds herself thrust in the midst of a global crisis. She hand-picks a team of eclectic specialists to prepare for first contact: Dr. Nigel Fenway (Brent Spiner), a disillusioned NASA microbiologist; Lucas Pegg (Rob Benedict), a brilliant but neurotic physicist; Arthur Ramsey (Peter Dinklage), an expert in languages and mathematics; and Cavennaugh (Brian Van Holt), a highly trained covert operative with a mysterious past. Together, they decipher the intention of the craft, the fate of the ship's crew and begin preparations for the possibility of a crisis situation - an alien invasion.