For the second consecutive year, “Dr. Feverdream’s Halloween Experiment” will take over Winchester Unitarian Society. Where multisensory installations, animatronics, immersive sets, hundreds of props, and dozens of actors promise visitors a Haunted House experience like no other. “Dr. Feverdream’s Halloween Experiment” offers spine-chilling experiences for thrill-seekers as well as friendlier adventures for young children and families. Concessions will be available.