DVD/Blu-ray: Martha Marcy May Marlene (15)

Sean Durkin's unnerving debut centres on Martha (Elizabeth Olsen), a young woman who has fled from a death cult and is now in hiding with her uptight sister (Sarah Paulson) and pompous architect husband (Hugh Dancy) at their luxurious lakeside home.

An air of menace is ever-present here, with flashbacks showing how Martha has been exploited and abused by cult leader (John Hawkes, excellent). The ambiguous ending is maddening, but this creepy indie horror lingers long in the mind.