Greta Hansen, also known as Madame Greta and "The Manipulator", is an evil old woman who lives in a haunted house and a character in the Season 5 episode "Old Sins Cast Long Shadows" of The Ghost Whisperer. She was portrayed by ????. She was killed when her wheelchair feel down the stairs in the early 1940's. When she died, the Shadows told her to give them children. In exchange, they wouldn't feed on Greta. According to Ned, Harry Houdini even attended one of her seances but couldn't debunk if Greta was legitimate with her work or not.