Stewart Granger is at his most dapper, suave, best in this otherwise completely unremarkable effort that offers a hybrid "Bond" meets "UNCLE" scenario. Luckily for us, it has the consummate baddie Curd Jürgens as his deadly foe and the scenes they have together, mostly towards the end, are what redeems it from serious mediocrity. It's all about "Sandra" (Karin Dor) who meets our charmer on an aircraft. He ("James Vine") has to land the thing, saving all the passengers, and soon discovers that she is about to come into $70-odd million on her 25th birthday and that there are moves afoot in…