When Debbie, Lucy, and later Professor Delacroix turn up dead, Roberta appeared to assist Elizabeth in her investigation, acting suspicious over the deaths. Roberta took Elizabeth down to the cellar to find a gun for protection, only to find Dr. Joseph Clampett leading a Satanic cult consisting of six girls, one of them being Jody.
At that moment, Roberta turned heel and revealed herself as a Satanic follower, pushing Elizabeth inside and shutting the cellar door. After her reveal, the evil Roberta claimed that Clampett is Satan incarnate, as Clampett attempted to convince Elizabeth to join them. Roberta, along with the other followers, perished in a fire set by Clampett as part of their sacrifice.
- Kate Jackson later appeared in the 2000 remake (of the same title) as hidden main villainess Olivia Burtis.