I'm a big fan of John Mills, he's made some masterpieces in his time. Sadly, "Mr. Denning Drives North" isn't one of them. The plot can't seem to decide whether to focus on Mills and his mental strain after the tragic events from the film's beginning, or on Sam Wanamaker as the ambitious solicitor who's determined to unravel the truth about John Mills's plight.
Frankly, I grew quite irritated with the film. The opening 15 minutes offered a vague hint of something which might have been good. Alas, this was not the case. The conclusion is one of the most ridiculous I've ever seen - and there are plenty to choose from!
The supporting cast are wasted. The likes of Raymond Huntley, Wilfred Hyde White and Herbert Lom have little to do. Why couldn't the scriptwriter incorporate their characters into the story properly?
John Mills does his best with such bland material and he's the only reason to give this film so much as a side glance.