This art-house movie from the mid-60s feels dramatically slow, though it does explore some intriguing ideas. A small-statured artist (Donald Pleasence) shares a home with his considerably younger French wife (Françoise Dorléac) in a castle situated on an island that's accessible only at low tide in northern England. The arrival of a rough gangster (Lionel Stander) disrupts their life, leading to chaos. Iain Quarri…