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Season 1 Episode
- Season 1 Trees Made of Glass (1)
- Season 1 Trees Made of Glass (2)
- Season 1 Blood of the Children
- Season 1 The Burning
- Season 1 Shock
- Season 1 Pulse
- Season 1 The Order
- Season 1 Revelations
- Season 1 Progeny
- Season 1 The Crossing
- Season 1 Outbreak (a.k.a. Escalation)
- Season 1 Vigilante
- Season 1 Alienville
Threshold - Season 1 Episode 1 Trees Made of Glass (1)
6.97 41 minutes A mysterious alien object attacks a Naval ship and crew. Dr. Molly Anne Caffrey, a government contingency analyst, is contacted by the Deputy National Security Advisor, J.T. Baylock, to investigate the incident along with a special scientific team of her choice.
