You're welcome. According to both TV Guide and TV Tome, the finale will be May 23rd. I hope they show repeats after the finale; I've missed a couple episodes and want to see them.
For any of you interested, Allison has a book out, Don't Kiss Them Good-bye, about her experiences with the paranormal (and to console those who have lost a loved one and/or have a gift like she does). Yes, Allison is real, and her book is very good!