S01E01 The Wrong End of Time - Pt 1
The year is 1970. A young girl called Sarah is walking along the boundary of a disused naval base in St. Oswald beyond a sign which clearly says "Ministry of Defence. Keep Out" She stops...
Simon is at the Ministry of Forward Development in Whitehall looking for Commander Traynor. The doorman is adamant he can't enter the building without a pass. Spotting Miss Stebbins in the corridor, Simon brushes past the doorman and pleads with her to see the Commander. Miss Stebbins explains that Commander Traynor is at 'R1' but she refuses to go into further detail about what 'R1' is because of the Official Secrets Act.
Simon Randall and Liz Skinner discover the existence of a strange anomaly, known as the “Time Barrier”, that enables them to travel in time to different historical periods in alternate pasts and futures.