The Doctor and Jamie enlist the help of UNIT to rescue Zoe and Isobel before trying to find out what Vaughn is really up to.
Did You Know?
This episode was watched by 6.4 million viewers on its original transmission. See more
Zoe States they saw a space ship on the other side of the moon when they didn't this was corrected in the animated reconstruction. See more
Referenced in Evolution of the Invasion