Secrets of the Unknown: Jack the Ripper
- Blwyddyn: 1987
- Gwlad: United States of America
- Genre: Documentary
- Stiwdio: Capital Cities/ABC Video Enterprises
- Allweddair: jack the ripper
- Cyfarwyddwr: Erik Nelson, Graeme Whifler
- Cast: Edward Mulhare, John Fleck
