"The Terminator" is the only volume in the iconic film series where the hair of the T-800 is changed in a dramatic way, according to Screen Rant. The change occurs after Reese blows up a car, allowing for a quick escape for himself and Sarah. When the T-800 jumps through the resultant flames, parts of his eyebrows and his hair are scorched off.
This signals two things to the viewer – the fact that the seemingly invulnerable machine can take some damage, and that there is unfathomable inhumanity that lies extent and waiting beneath the human exterior of the T-800. And that's not the only bit of damage it manages to incur throughout the movie. As the bullet holes, burn marks, and indentations begin to mount up, more and more of the metallic center of the cyborg is exposed.
Eventually, the Terminator is nothing but a deadly metal exoskeleton to be vanquished – something that Sarah and Kyle have to do as a team before Sarah can face a challenging future and the T-800 can be reborn into a much more catchphrase-friendly future.
