!!The 1972 film:
* AdaptationDisplacement: Not so severe as some examples, but the book is much less famous than the film.
* EnsembleDarkhorse: Martin and Belle. Martin for his great CharacterDevelopment into the competent and level-headed voice of reason of the group, and Belle for her memorable swimming scene where [[spoiler:she saves Reverend Scott's life.]]
* FunnyMoments: Early on, Robin fights with Susan and says "Shove it!". Susan tells him never to talk like that to her, prompting him to say "Shove it shove it shove it!".
* HilariousInHindsight: Creator/LeslieNielsen playing it straight as the captain of the ''Poseidon'' in a disaster movie, seven years before ''Film/{{Airplane}}'', a spoof of disaster movies. The [[LeslieNielsenSyndrome Syndrome]] was still [[Series/PoliceSquad a decade away]].
* IncestSubtext: Nonnie seems really close to a guy in the band, stroking his face while singing a love song to him. When he dies she similarly strokes his face and is inconsolable. Then we find out he's her brother.
* NightmareFuel: The guy who falls ''into the ceiling light''.
* TheScrappy: Nonnie for being TheLoad.
* TearJerker: After [[spoiler:Mrs. Rosen dies, her husband refuses to leave her side]].
** [[spoiler: Mrs. Rogo's death, which causes her husband to break down in tears and fall into [[HeroicBSOD a deep depression]]]].

!!The 2005 TV movie:
* WhatAnIdiot: The Cruise Director, who gives away Rogo's purpose as a sea marshal, and insists that everyone stay inside the dining room, even after it's pointed out that the ship will inevitably sink.
* WhatDoYouMeanItsNotSymbolic: Near the end of the film, the survivors have to cross over a pit of fire via a narrow bridge. The only ones who don't make it are [[spoiler: Badawi, who masterminded the terrorist plot, and Shoshanna, who was Richard's mistress]].

!!The original novel:
* ValuesDissonance: The whole "[[spoiler:Susan]] getting raped" subplot, full stop. Not only is the attack itself [[GratuitousRape completely superfluous to the plot]], but her subsequent reaction to it (she sympathizes with her attacker, to the point of mourning his death, planning to meet his parents after getting rescued, and ''hoping she's carrying his rape-child'') could only be the product of a male author from a pre-feminist generation.