A lot of 'alternative' comedy in Britain in the 1980s was insular, misguided, overly-political, and unfunny, and the worst of the Comic Strip Presents... stuff fell into this category.
But this is at the other end - a remarkable film that works on different intellectual levels.
Is Dennis a criminal mastermind or is he lying?
Is he telling the truth, bluffing, double-bluffing, counter-doubly-bubbly-bluffingwhatever?
I've probably watched Supergrass 20 or 30 times, and I still can't decide 100%. That's the wonderful thing.
As well as Ade Edmonson, there are big roles for other early Comic Strip mainstays - French & Saunders, Pete Richardson, Alexei Sayle, Keith Allen, Nigel Planer and Robbie Coltrane, though curiously enough not Rik Mayall.
All of the Comic Strip cast - however much I disliked the hidden agenda of some of their members - are convincing actors, and turn in superb performances in this big-screen outing, while the Richardson-Richens writing team's work is so often pure genius, with nice little touches of detail throughout.
Ultimately this is a study of crime, criminology and human nature, in all it's wondrous complexity. And very funny with it. You will not be disappointed.