Trees Made of Glass (2)
Show: Threshold --> Season: 1 - Season 1
AirDate: 9/16/2005
Runtime: 41
Voting: 7 (5)

Overview: 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.