Pretty Little Liars: 13 Things to Expect From the Game-Changing 7th Season

Collins explained, "I think that revenge is a motivating factor for Rollins and Mary. I think that could be a fair thing to deduce from the finale. I don't think that the lengths they've gone to could have been reached without there being more to it than money as the motivation. . . . You're going to see, hopefully, the bones of why this plot came about and why they have gone to such lengths and how that impacts them going forward."