The Queen's Ransom (S05E01)

In Monte Carlo, the Saint saves the life of Fallouda, the ex-king of Fedyra. Fallouda tells him he aims to return to power and will raise money by selling the jewelry of his wife, Queen Adana. The Saint and Adana set out to collect the jewels, the journey being initially icy as the queen is the daughter of a London bus driver and feels the Saint should give her more respect. (Prime Video)