The Mystery of Willoughby Castle
- Xyoo: 1979
- Ncig Teb Chaws: United States of America
- Genre: Family, Mystery
- Studio: Quadrus Production, Quadrus Communications
- Cov ntsiab lus:
- Tus Thawj Coj: Luisa Morell
- Pov Pob Tseg: Kevin Rodell, Luisa Morell, William Lowry, Ned York, Martha Webster
