This one killed the series
It's hard to guess if more success would have meant more Flint films, but even when I first saw this entry back in 1967 it disappointed - and time has not been kind to Flint Opus II.
Parodying Bond, the series was going to be challenged due to lower budgets - all those obvious bits of stock film but they kind of made it work the first time.
This time the strengthes are again Coburn - who would have been amazing with stronger support in the Flint films, Lee J Cobb and the great musical score. The action scenes work quite well, but the pace, supporting cast and direction are right out of the worst of the Matt Helm flicks. The studio aimed low and that's basically what we got.