Manori Ravindran International EditorSPOILER ALERT: Do not read this story if you haven’t watched Episode 4 of “Our House.”As London’s Machiavellian property market continues to feel like a real-life thriller, U.K. broadcaster ITV’s drama “Our House” capitalizes on every buyer’s worst fear of losing their hard-earned home.Starring Tuppence Middleton (“Downton Abbey”) and Martin Compston (“Line of Duty”), the four-part thriller from “Sanditon” producers Red Planet Pictures is adapted from Louise Candlish’s 2018 novel of the same name, and may actually be the only thing more anxiety-inducing than closing on anything larger than a garden shed within the M25.Middleton stars as Fi Lawson, a woman who returns home after a weekend away to discover strangers moving into her house — and her husband Bram (Compston) and children nowhere in sight.