This episode is very different from the rest in the season in that the team are not facing an alien threat or some other kind of horror. Instead, it is a poignant tale of travelers from 1953 who get caught in a time loop and try (and largely fail) to fit in with modern times.
The 1950s passenger plane is a De Havilland DH-89A Dragon Rapide 6 with registration number G-AIDL
Automatic doors existed in ancient Egypt. The use of optical scanners to trigger them was invented in 1931. They were not in widespread use until the 1960s.
Given the point of view from Owen's living room window, he apparently resides in or near the Harbour Pointe Apartments on Stuart St. in Cardiff.
Own takes Diane dancing at the car-park on the roof of a building on Tredegar St. a block over from the Altolusso luxury apt. building in Cardiff. The distinctive profile of the stairway shelter can be seen in S:1/Ep:1, in the panorama shot of Jack standing on the roof of the white, tri-lobed Altolusso building.