At its best (and there is no worst), this marvelous play is fully felt from Christopher's eyes out: The Curious Incident delivers another worthy way to wonder at the world. A visceral young actor who channels everything at just the right moment and pace, Langdon kinetically registers Christopher's anguished, electrifying living-in-the-moment. A jittery mindset that initially feels chaotic and anarchic evolves magnificently; Christopher pushes beyond the false purity of prime numbers to the messy ambivalence of flawed parents and conditional love without even once mentioning Asperger's. (Benjamin Wheelwright plays Christopher on Saturday and Sunday matinees.) The necessarily supporting performances are totally credible, both as actual adults and manifestations of Christopher's consciousness; the tight ensemble members don't just play multiple roles, they move scenery and each other around the stage.