|Psycho Beach Party (2000) [Angel]: Throat slit (off-camera) by Matt Keeslar while waiting in the car at a drive-in movie. We see the killer bring the knife up to her throat, then shortly afterwards we see a brief shot of her body when Danni Wheeler finds her dead.
Desperate Housewives: One Wonderful Day (2005) [Diedre]: Reportedly stabbed in the stomach by Brenda Strong when Jolie tries to take back her baby. (This occurred before the series actually began, and was shown in flashback in this episode.) (Thanks to Alex)