When Esmé is giving a tour of the house, she shows "... Spain's largest handkerchief...", which is basically a huge Spanish flag. Although not concrete located in time the style of wardrobe and cars in the series is 50s-sh. In that period, the Spanish flag was different (with a black eagle in the middle) corresponding to the Francisco Franco's dictatorship regime. Whereas, the one depicted in this episode corresponds to the national flag of Spain with its present-day coat of arms (officially established on 19 December 1981 short after the democracy was restored). Although historically inaccurate, it is proof of good taste from the producers not having used a flag with so sinister connotations (at least for Spanish audiences).