Transient Being

Transient Beings were an evil entity in the British TV series Sapphire and steel but didnt make an appearance untill Assignment six which was aired iin 198x the location of the encounter was a gas/service station were time stood still and a myterious cuople from 1948 were seated inside the cafe then another man appeared from 1923 then a man from 1955 then Sapphire discovered they wer sent to kill them