During the initial fight in the house between Cameron and the rival Terminator, the shot gun Sarah pulls out of the wall is the same model the character used against the T-1000 in the final scenes of Terminator 2: Judgment Day (1991).
Aaron James Cash who plays the dream sequence Terminator was sitting in a coffee shop opposite Josh Friedman and asked him what he was writing on his laptop. The conversation eventually led to him being cast in the role.
Given the hectic schedule of an effects-heavy sci-fi TV series, David Nutter was keen to employ a director of photography who had had experience in that field. The chief candidate was Bill Roe, who had been heavily involved with The X-Files (1993) when it moved its shooting to Los Angeles.
A lot of the promotional material for this first season features interviews with a completely bald Thomas Dekker. This was because the interviews were recorded when he was in the middle of production of My Sister's Keeper (2009) in which he plays a cancer sufferer undergoing chemotherapy.