After a field agent disappears while keeping surveillance on the home of the mother of missing Big Horn ship crewman Sonntag, Molly and Cavennaugh head to New Harmony, Indiana to investigate the crewmember's hometown.

There they encounter the local preacher, Reverend Lavory, who is captivating his parishioners with his visions of a "sea of glass" and the impending apocalypse. After they witness other bizarre happenings in the town, Molly and Cavennaugh keep a suspicious eye on Reverend Lavory while also looking out for any signs of crewman Sonntag's reemergence.

Meanwhile, when it's suspected that crystals formed on washed-up wreckage of the Big Horn are capable of spreading infection, Fenway, Pegg and Ramsey search the ocean floor to find the remaining pieces of the ship to before there is any possible contamination to the surrounding environment.

Threshold Season 1 Episodes...

• s01e01 - Trees Made of Glass (1)
• s01e02 - Trees Made of Glass (2)
• s01e03 - Blood of the Children
• s01e04 - The Burning
• s01e05 - Shock
• s01e06 - Pulse
• s01e07 - The Order
• s01e08 - Revelations
• s01e09 - Progeny
• s01e10 - The Crossing
• s01e11 - Outbreak (a.k.a. Escalation)
• s01e12 - Vigilante
• s01e13 - Alienville

Threshold Show Summary

A team of experts are assembled when the U.S. Navy makes a chilling discovery: an extra terrestrial craft has landed in the mid-Atlantic ocean. Dr. Molly Anne Caffrey 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. 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, a disillusioned NASA microbiologist; Lucas Pegg, a brilliant but neurotic physicist; Arthur Ramsey, an expert in languages and mathematics; and Cavennaugh, 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.