This episode aired in two parts when broadcast in the United States, as well as when it received its television premiere on BBC Two in the United Kingdom.
Hampton-on-Sea was a real-life coastal village that was abandoned due to erosion of the shore-line. It started as a tiny fishing village in 1864 and grew into a large fishing town due to investment by an oyster company that built a large fishery in the bay. In 1879 land developers started buying up property in the town in the hopes of turning it into a resort. Construction began on a resort hotel in 1880, but by 1883 it was clear that continuing construction was not feasible due to erosion of the shore, as the building was damaged several times during construction due to the foundation washing out. The oyster fishery closed in 1884 and soon after the town's train station closed as well. A few other developers tried to repair the shore-line and prevent further erosion, but their attempts were ultimately unsuccessful. The town was eventually abandoned in 1916 and the buildings were completely submerged underwater by 1921.
The episode title "The Strangers' Home," is spoken by Frank Thatcher (Benjamin O'Mahony). "The strangers' home, sir?"
David Warner (Rabbi Max Steiner) played a version of Jack The Ripper in 1979's Time After Time.
The second half of the Season Four premiere (which was double length on Amazon Prime) when it is edited down for repeat transmission.