* ActorAllusion: Brian Cox plays Richard Morgan, [[spoiler:whose wife killed herself because their (adopted) child's uncontrollable psychic powers burned horrific images into her mind]]. One year later, in ''Film/X2XMenUnited'', Brian Cox plays William Stryker, [[spoiler:whose wife killed herself because their (mutant) child's uncontrollable psychic powers burned horrific images into her mind]].
* TheOtherDarrin: Sadako is played by a number of actresses over the years - Rie Inou (''Ring'', ''Ring 2''), Hinako Saeki (''Rasen''), Yukie Nakama (''Ring 0''), Ai Hashimoto (''Sadako 3D''), Ayane Miura (''Ring Kanzenban''), Tae Kimura (''Ring: The Final Chapter''), and Akiko Yada (''Rasen'' TV series).
* PropRecycling: The "COPY" tape from the 2002 remake is the actual "COPY" tape from the 1998 original.
* SequelGap: Koji Suzuki took a hiatus from writing the series after the publication of the anthology novel ''Birthday'' in 1999. The next sequel, ''S'', wasn't published until ''13 years later'' in 2012, coinciding with its film adaptation, ''Sadako 3D''. This is reflected in-universe: the protagonist is 28-year-old Takanori Ando, whom we last known was a [[spoiler: [[BackFromTheDead resurrected]]]] 3-year-old boy in ''Spiral''.
* ShrugOfGod: In the American remake, fans of the film note that the victims of Samara look like they'd been drowned, which would make sense considering Samara's predicament. However, both Gore Verbinski and makeup FX artist Dick Smith said that wasn't their intention. They just wanted to make them look creepy.
** Further reinforced by [[spoiler: the montage near the end showing Samara's victims, with the repeat of Richard Morgan's line: "You take one person's tragedy and force the world to experience it... spread it like sickness."]]
* TechnologyMarchesOn: Pfft, cursed videotape.
** Though ''Sadako 3D'' gets around this, by having the curse apparently spread via WebVideo...
** And now smartphones as of ''Sadako 3D 2''...
** The original ending for the remake had [[spoiler:the video getting placed in a video store dropbox and placed on a shelf of recommended videos. This would have implied that the Ring virus would spread across Seattle and possibly the entire country.]]
** In a deleted scene of the American remake, Noah finds the innkeeper's corpse in the middle of the lake near the cabins. It is hinted he had watched the videotape and tried to flee Samara.
** The US remake had originally a storyline where Rachel shows the tape to a death row prisoner played by Chris Cooper. This was dropped, but a newspaper article about Cooper's character can still be seen.
** The creators of the American version also had plans to include an all-CG scene which takes place [[TechnologyPorn inside a VCR]] when the cursed videotape is created. This never went beyond pre-visualization, although some of it is seen in the trailer.
** For the American version, a card announcing Samara's birth was made, but it didn't appear in the film.