Hired Gun
S3, E21: Dusty Ayres, a human who was used as an experimental subject by the Invid, has his mind set on revenge as he systematically goes about destroying those he feels responsible for his torture at the hands of the Invid.

S3, E21: Dusty Ayres, a human who was used as an experimental subject by the Invid, has his mind set on revenge as he systematically goes about destroying those he feels responsible for his torture at the hands of the Invid.