The series continues the adventures of paranormal investigators Dr. Peter Venkman , Dr. Egon Spengler , Winston Zeddemore , Dr. Ray Stantz , their secretary Janine Melnitz and their mascot ghost Slimer . The series continues the adventures of paranormal investigators Dr. Peter Venkman , Dr. Egon Spengler , Dr. Ray Stantz , Winston Zeddemore , their secretary Janine Melnitz and their mascot ghost Slimer .