Bad Ronald
- Blwyddyn: 1974
- Gwlad: United States of America
- Genre: TV Movie, Drama, Thriller, Horror
- Stiwdio: Lorimar Productions, American Broadcasting Company (ABC)
- Allweddair: based on novel or book, murder, death, mental illness, peeping tom, death of mother, voyeurism, voyeur, hidden room, disturbed teenager, crawlspace
- Cyfarwyddwr: Buzz Kulik
- Cast: Scott Jacoby, Pippa Scott, John Larch, Dabney Coleman, Kim Hunter, John Fiedler