Kernohan began her career in 1988 when she appeared in the low-budget slasher film Fatal Pulse. She appeared in several other films during 1988 including Roger Corman remake Not of This Earth, the post apocalyptic action film She-Wolves of the Wasteland and the film in which she is best known for, Critters 2: The Main Course, where she plays "Lee", the bounty hunter. The same year she appeared in the documentary The Decline of the Western Civilization Part II: The Metal Years. In 1989, she appea...