What lines would you cross to be with your soulmate? That’s the question posed by the time-travel romance epic “Needle in a Timestack.” The movie’s first trailer gives a taste of what happens to four people put in that situation. READ MORE: Fall 2021 Movie Preview: 60+ Must-See Films “Needle in a Timestack,” based on a short story of the same name by Robert Silverberg, follows a blissful married couple, Nick and Janine.