"Terrestrial television" is a title based upon conjecture.
Check the behind the scenes section, the revision history and discussion page for additional comments on this article's title.
UNIT's Sgt Catherine Petts, not exactly taking the alien contact that had been reached seriously following the disappearance of Guinevere One, she mentioned that they had a "TV channel", and that it was on "terrestrial, digital, cable, satellite, swanky mobile phones, and even behind the bloody red button." (PROSE: Guinevere One)
Behind the scenes[]
Only the medium type is mentioned; the "television" part was omitted in PROSE: Guinevere One.