_**Mid-60’s art house flick is dramatically tedious, but has interesting themes**_ A diminutive artist (Donald Pleasence) lives with his much-younger French wife (Françoise Dorléac) in a castle on a tidal island in northern England. When a gruff gangster (Lionel Stander) shows up on their doorstep havoc ensues. Iain Quarrier, William Franklyn and a young Jacqueline Bisset show up for peripheral parts. "Cul-de-Sac" (1966) is one of Roman Polanski's early experiments, a freestyle B&W psychological crime dramedy that takes elements of “The Damned” (1963), “Touch of Evil” (1958) and “A Streetcar…