A law of diminishing returns on film value

Rating: 5/10 (9 June 2014)

One has to wait about 4 or 5 years between Riddick films, all of which I love. I guess I wish all the effort spent on regurgitating F&F went into delivering Riddicks more often!
Of course I realise such a preference is harder to satisfy, given the relative cost of sci-fi, whereas, apart from smashing up a few cars, F&Fs tend to be relatively low budget.
The first F&F had some suspense but after that with the details of the roles established it just seems to recycle to no good effect. I did like some of the theme tunes, although it needs to go more underground for the music accompanying the action.
The basic plot seems just too similar between one issue and the next for my tastes.