Candy Buckley joins George Hearn, Roz Ryan and other thesps in rounding out the cast of incoming Broadway musical “Scandalous.”Buckley (“Cabaret,” Bucks County Playhouse’s “Barefoot in the Park”) appears in the show as the mother of protag Aimee Semple McPherson, to be played by topliner Carolee Carmello. Hearn (“La Cage aux Folles,” “Sunset Boulevard”), Ryan (“The Pajama Game”), Edward Watts and Andrew Samonsky (“South Pacific”) also are among the principal cast of the bio-musical about an early 20th-century evangelist. With book and lyrics by Kathie Lee Gifford and music by David Pomeranz and David Friedman, “Scandalous” preemed in D.C. in 2007 prior to a 2011 stint in Seattle, where the show’s cast also included Carmello and Ryan. David Armstrong helms the Broadway incarnation of “Scandalous,” which could potentially get a marketing boost from Gifford’s high-profile morning TV gig as one of the hosts of NBC’s “Today.” Creative team includes Lorin Latarro (choreography), Walt Spangler (sets), Gregory A. Poplyk (costumes), Natasha Katz (lights) and Ken Travis (sound). Production begins previews Oct. 13 ahead of a Nov. 15 opening at the Neil Simon Theater.