* EnsembleDarkhorse: Lucas and Darwin were consistently the most popular characters.
* HarsherInHindsight : In "The Regulator", the villain of the episode faked his own death by suicide to avoid condemnation by his peers. Lucas responds by saying "I can sympathize." Knowing that Lucas's actor, Brandis, would later go on to commit suicide makes for a truly DudeNotFunny cringe-moment.
* JumpingTheShark - all seasons after the first.
** Arguable, some think the show only found itself during the third season, but too late to save itself. No one, however, thinks season 2 was the best of the lot.
** While the plots often left something to be desired, the second season was actually very good with characterization, especially giving ADayInTheLimelight to many of the secondary characters. (While the first and third seasons tended to revolve around 2-4 main characters and relegate everyone else to the background.)
* NightmareFuel: "Knight of Shadows", fitting for the show's Halloween episode. To cap them all, we have a [[CreepyMonotone mysterious set of directions]], an apparition hurtling Bridger across his room, ''a man looking straight at the main characters during a'' '''paused video''', something alternatively setting doorknobs on fire (literally) or freezing them solid for threat of frostbite, and threatening them in general.