Gibney Dance brings back its DoublePlus series, in which well-known choreographers present the work of emerging and under-exposed artists. First up this season, selected by Tere O'Connor, are two powerful dancers with smart ideas. Mr. Jones's "Part II: Jean" explores loss and how the body holds onto it, while Mr. Brown's "Miami Spice" takes formal inspiration from the wide-open landscapes of his rural upbringing.