Timeslip

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 as she hears a strange electronic noise. She wanders closer to the base and is seen by Tom Ferris, a farm labourer. Ferris calls out to her but she is mesmerised by the strange sound. She feels out to an invisible barrier that appears to be set between a series of redundant concrete fence posts... and suddenly vanishes into it! The labourer stumbles disbelievingly to the remains of the fence but finds nothing to credit what he has just witnessed save a discarded handkerchief.

Jean is having a nightmare about Simon and Liz. Her nightmare appears to be connected to events in 1940. Liz cannot accept that the young naval rating could be her father and that the place they are in is the derelict naval station at St. Oswald's, but in 1940 when it was a research centre under the command of Mr Traynor. She questions young Frank further and offers some facts about where and when he was born. To Frank's astonishment, she is right! At the Bull Inn, Skinner is wandering about. He chances upon Traynor in the lounge.

An angry Gottfried takes Simon and Liz back to the Operations room. On the floor is the unconscious Frank. Traynor and Skinner are still arguing outside the naval station. Gottfried asks Liz what is wrong with Frank. He checks the supply room for an explanation but finds none. He tells Liz to look after Frank in the Common room. Simon is fiddling with the radar equipment when Gottfried sees him and tells him to stop, believing that Commander Traynor has told him to sabotage it. He orders Liz to fix them all some food whilst Simon tells him all he knows about the equipment. Graz and Fritz take the unconscious Frank into the Common room where Commander Traynor is also imprisoned.