La saison 10 de Never the Twain a été diffusée sur ITV1 du mercredi 5 septembre 1990 au mercredi 10 octobre 1990. Elle comporte 6 épisodes, le premier s'intitule "X Marks The Spot" et le dernier "A Car By Any Other Name".
Simon Peel and Oliver Smallbridge contest a bitter rivalry in all that they do. Not only are they next-door neighbours, they are also rivals in the antiques market (formerly business partners, they are now pursuing trade individually). Typifying his character, Peel believes that he deals in the best end of the business, Smallbridge the tatty end.