Sellers plays a man thirty years older than himself and does it impeccably. The underplaying looks forward to Chauncey Gardener, the beautifully timed physical comedy to Clouseau. Someone- I forget who- nominated the scene where Sellers- intent of killing Cummings- gropes blindly in the kitchen drawer for a butcher's knife and then nearly stabs her with an egg whisk- as the funniest in the history of the movies. Well, it's certainly very good.
When we deplore the British film industry- always languishing in the shadow of Hollywood, always lapsing into crisis- we overlook the existence of movies like this- underpromoted, cheaply-made, characterful, often rather wonderful- and that there are scores and scores of them.