"High Desert Kill" (filme de TV de 1989)?
Aqui está um resumo do enredo da IMDb:
Like every year, Jim, Ray, Brad and Paul leave the town for a week to go hunting in the woods. But this year everything is different: There's not a single animal to be found, the whole forest has fallen quiet. Two female campers they meet have mysteriously disappeared the next day, leaving their whole equipment behind. And then they start to behave weird themselves... An alien power is using them for cruel psychological experiments.
Aqui está o filme inteiro do YouTube, a cena com o metamorfo que aparece em uma janela na forma de um personagem que morreu antes começa às 1:29:00.