A fictional starship featured in the first three seasons of the BBC television series Blake's 7.
The Liberator was an abandoned spacecraft found drifting near Cygnus Alpha, it was equipped with powerful weapons, force field protection, and a system of "battle computers". The ship was originally built by a race of beings known as "The System". The System referred to the ship as DSV2 ("Deep Space Vehicle 2")
Liberator was destroyed after passing through a cloud of corrosive micro-organisms in the third season final episode "Terminal"