Beta Film’s Channel4/Starz drama series “The Couple Next Door” is moving across European neighborhoods, being sold ahead of Mipcom to Movistar Plus+ in Spain and throughout the Nordics. Public broadcasters NRK for Norway, YLE for Finland, SVT for Sweden, DR for Denmark and RUV for Iceland snagged the thriller, starring Sam Heughan (“Outlander,” “Suspect”) and …