A series of murders occur that mirror those committed by the Whitechapel Ripper. Through his experiments with psychoanalysis Dr Pritchard discovers a deadly violence in one of his young female patients. As he delves into the recesses of her mind he uncovers that Anna is possessed by her dead father's spirit, willing her to commit acts of gruesome savagery over which she has no control. But the most chilling revelation of all is the identity of her father: Jack the Ripper himself.

• Hammer Film Productions
• Eric Porter
• Angharad Rees
• Jane Merrow
• Keith Bell
• Derek Godfrey
• Dora Bryan
• Marjorie Rhodes
• Barry Lowe