Gunneson reappears in Caffrey's house. Meanwhile, Lucas, Nigel and Ramsey try to break down how the alien signals and DNA operate and come up with some interesting theories. Cavennaugh's team tries to locate Gunneson other shipmates.
| Title | Threshold - Season 1 Episode 2 Trees Made of Glass (2) |
|---|---|
| Year | 2006 |
| Genre | Sci-Fi & Fantasy, Drama, Action & Adventure |
| Country | United States of America, United Kingdom |
| Studio | CBS |
| Cast | Carla Gugino, Brian Van Holt, Brent Spiner, Rob Benedict, Peter Dinklage, Charles S. Dutton |
| Crew | David S. Goyer (Producer), Brannon Braga (Producer), Marc Rosen (Producer), Dan O'Shannon (Producer), David Heyman (Executive Producer) |
| Alternative Titles | |
| Keyword | washington dc, usa, alien, alien invasion, government cover-up, top secret, government conspiracy |
| First Air Date | Sep 16, 2005 |
| Last Air date | Feb 01, 2006 |
| Season | 1 Season |
| Episode | 13 Episode |
| Runtime | 41:14 minutes |
| Quality | HD |
| IMDb: | 7.01/ 10 by 74.00 users |
| Popularity | 12.922 |
| Language | English |
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