Time travel is possible. All you need, at least according to Trisha Baga’s thirty-five-minute 3D video 1620, 2020, is an old onion and lemon, a few connecting wires, and a computer running on a chirruping dial-up modem. Such is the gizmo that, per the Filipino-American artist’s labyrinthine narrative here, transports a present-day experimental theater troupe, DNAUSA, back to the beginning of colonial American history—the landing at Plymouth Rock in 1620—in order to perform gene therapy on the country itself, opaquely repairing flaws in the “narrative DNA” encoded in the rock. The performers