Calling all ghost-busters. Dr. Don Walker wants you. Dr. Walker, a longtime volunteer with the Cincinnati Historical Society, is fascinated with the tales of Cincy’s phantasmic spirits and ghostly apparitions. Enough so that, each October, he leads “Haunted Cincinnati” charter bus tours through the region’s spookiest buildings and eeriest byways.

“We started the tour about 10 years ago,” says Dr. Walker, a Kenwood resident and city history buff who traded his medical practice for his particular passion. “It’s a funny story. We had scheduled a regular Cincinnati Historical Society bus tour. It was in October, and people had started making reservations. Somebody off the top of their head said, let’s go to see all the haunted houses.”

Dr. Walker’s research for that first tour included delving into a series of books called Haunted Ohio, but he also credits one of the librarians at the Kenton County library. “It seems he’d been collecting newspaper clippings for years. He let me copy stuff from a file, and it sort of took off from there.”

You can’t label Dr. Walker any sort of raving looney-tune. A longtime Cincinnati physician (med school at Case Western Reserve and residency at the elite University of Pennsylvania hospital in Philadelphia) with his feet planted firmly on the ground, he opened his private practice in 1962 and worked for decades before retiring.

“I wasn’t all that old when I retired,” recalls the physician-turned-metaphysical maven. “It was right at the time that the Cincinnati Historical Society was moving into Union Terminal, and I thought it’d be great to get involved with it. I was in the very first 14-week class for docents.”

Flash forward to one of Walker’s bus tours. Dozens of the curious and paranormally minded meet at Museum Center and climb aboard a 48-passenger motorcoach for their journey into the netherworld. Yeah, we’ve got ghosts. Isn’t this, after all, the city where Rod Serling launched his Twilight Zone career?

Take Bobby Mackey’s nightspot in Wilder for instance, where Walker’s tour stops first and where he says ghosts and macabre doings are nearly legend. “This is one of my favorite ghost stories. It’s about Pearl Bryant, the lady who lost her head and is said to be haunting Bobby Mackey’s place. Pearl was pregnant at the time she was killed, and when Bobby Mackey’s wife was pregnant, the ghost was really mad at her and attacked her.”

A personal favorite on Walker’s bus tour is the Reuben Resor House. The Gothic-Italianate mansion — at 3517 Cornell Place in Clifton — was once home to a school for young ladies, but closed after one of the girls died in the house during the 1919 flu epidemic. Her restless spirit still haunts the halls of this place, now an apartment building. Experts from the University of Cincinnati have even visited, but left, unable to explain inexplicable cries, knocks and footsteps.

All this leads me to ask: Does Walker really believe in all this psychic supernatural stuff, or is it just a sneaky way to teach Cincinnati history?

“Do I believe in ghosts?” responds Walker. “Now that’s an unfair question. That’s like asking a plastic surgeon if he believes in surgery.”