The Undying Monster
- Blwyddyn: 1942
- Gwlad: United States of America
- Genre: Horror, Mystery
- Stiwdio: 20th Century Fox
- Allweddair: werewolf, police investigation, local legend
- Cyfarwyddwr: John Brahm
- Cast: James Ellison, Heather Angel, John Howard, Bramwell Fletcher, Heather Thatcher, Aubrey Mather