* ''Tron'', of all people, takes a turn for the terrifying in the "Scars" two-parter.
-->'''Tron:''' ''(to Dyson)'' You watched me die? ''I'll watch'' '''you''' ''die''.
** His facial scars expanding to their horrific full extent helps quite a bit in this regard.
* The torture scene in Tron's backstory. It's mostly shown on screen, with Tron strapped to a table and Dyson just cutting away at him with a buzz-saw. When the camera changes to a shot of the guards right outside the lab, there are bright flashes of light visible through the door every time the buzz-saw revs up and cuts into Tron. Then he does it to Tron's face. Jeez...
* Pavel's "test run" of his restored upgrade disc in "Rendezvous". He gleefully ''murders'' a group of prisoners. His smile just before is ''incredibly'' off-putting. To say nothing of his manic laughter and psychotic expression ''whilst'' he does it.
* Gorn at the end of the same episode. Faces are not supposed to do that.
* Code worms (again from "Rendezvous"). ''Dear Users'', code worms. They're essentially the Grid equivalent of [[Film/StarTrekIITheWrathOfKhan Ceti Eels]] (except they enter through a Program's ''eye sockets''), they can be used to implant false memories within a Program's code or disc or to delete real ones, and they can cause ''hideous'' physical damage to a Program when mishandled (a mishap with a code worm is implied to be responsible for the hole that obliterated one of Gorn's eyes and goes ''all the way through her head'').
* Some of the deaths in this show look like stuff out of a horror movie. For instance: [[{{Gorn}} A soldier bisected by the waist, dragging himself across the floor, while bleeding pixels all over the place]].
* In Dyson's flashback in "Scars, Part 1" at the gathering of Tron, Dyson, Clu and Flynn, Clu's EvilTwin tendencies are shown in a rather jarring way. He stands behind Flynn, [[UncannyValley emulating his movements]], but unlike Flynn who smiles in a friendly and almost fatherly way, Clu's expression is a wicked PsychoticSmirk.
* The [[SlasherSmile faces]] Cutler makes [[spoiler:as he dies.]]
* [[http://tron.wikia.com/wiki/Cyrus Oh my god, Cyrus!]] His debut episode and the NotQuiteDead at the end were appropriately creepy.