Hell and High Water is a 1954 Fuller offering

Hell and High Water is a 1954 Fuller offering in a more wild-eyed vein.
I last saw this when I was very young, and memory fades, but… As I
recall, it concerns a submarine for hire (yeah, I know, but just roll
with it) skippered by Widmark, which is hired to check out reports that
the Chinese are preparing a shifty little trick with a captured B-29 -
namely, carrying out a nuclear attack on themselves in order to trigger
WW III. The climax – submarine vs. nuclear-armed bomber – is one of the
damndest things ever put on film. When they finished with Fuller, they
broke the mold for good.