!!From the show
* SugarWiki/AwesomeMusic: Music/JohnWilliams' theme song from season three.
* MemeticMutation: "Danger, Will Robinson!"
** "Oh, the pain!"
* {{Narm}}: Hoo boy. Probably most notable is the episode "The Great Vegetable Rebellion," where Mark Goddard has noted that during several shots you can see him deliberately not looking at the vegetable people so he wouldn't laugh.
* VillainDecay: Doctor Smith went from a fiend planning to [[KillEmAll kill everyone on the ship]] for some vague reason to a [[JerkWithAHeartOfGold prissy jerk who actually saved the crew sometimes]]. Unusually, this was actually at the request of his actor, Jonathan Harris, who feared that Smith would soon be killed off if he continued being a threatening villain.

!!From TheMovie
* SugarWiki/AwesomeMusic: Bruce Broughton's score (ignore the screen and listen to the track "[[http://www.youtube.com/watch?v=ZDi_61LYEHs Through the Planet]]").
** Or better yet, ignore the movie and just buy the soundtrack (the Intrada score CD, '''not''' the song album - while the latter does have 30 minutes of Broughton, you have to sit through an awful lot of techno [in both senses of the term] to get to it. And most of the songs are only heard over the end credits anyway! Plus Broughton's stuff is all on the lengthy score CD under other names).
** Although you gotta admit that [[https://www.youtube.com/watch?v=QBRtOpwaehM Apollo 440's take on the John Williams theme song was pretty cool]].
* CompleteMonster: [[MorallyAmbiguousDoctorate Dr. Zachary Smith]] was already a self-serving sociopath throughout this film, however it isn't until later, through the means of time travel, that we see his truly monstrous future self. Originally working with the international terrorist group known as the Global Sedition, Smith tried to murder the entire Robinson family, [[WouldHurtAChild including the children]], [[{{Greed}} just to make a quick buck]]. However, when the botched assassination ended with him stranded on an alien planet with the family, Smith showed himself to be an absolutely depraved monster. Having mutated into a monstrous spider-like creature, Smith murdered and possibly ate the defenseless Maureen, Judy, and Penny Robinson, then manipulated young Will into building a time machine in order to save his family from death, all the while making Will see him as a father figure. When Smith meets his past self, he mocks him for lacking "true ambition" before attempting to murder him. After Will completes the time machine nearly two decades later, Smith tries to kill him while revealing his master plan to use the machine to travel to Earth, then unleash a horde of spider monsters to ravage the planet and [[AGodAmI rule over them as a god]]. In a sharp contrast from his [[Series/LostInSpace original humorous and clumsy iteration]], Dr. Smith is a truly wicked individual who [[ItsAllAboutMe cares for nothing but himself]].
* HamAndCheese: Creator/GaryOldman as Dr. Smith.
* HilariousInHindsight: Penny-vision brings to mind many a [=YouTube=] vlogs and selfies.
* InferredHolocaust: In the movie, since the Proteus had an entire sphere housing a botanical garden, it's possible it was one of many Space-Arks built to contain the last survivors of the human race; since without John Robinson to lead the team in building the Hypergate at Alpha Prime, Humanity would have been utterly ''screwed'' when the planet became uninhabitable.
** And it's heavily implied that Blarp's vessel wasn't the ''first'' ship the Spiders stowed away on. Particularly since it's shown that they can survive in the vacuum of space and remain dormant for decades at a time and [[TheVirus mutate]] other creatures into hosts to incubate their young...
* MoralEventHorizon: If Smith hadn't crossed it when he tried to sabotage the Robinson's trip by programming Robot to kill them all, children included, he surely crossed it [[spoiler:in the timeline where, once he mutated into a spider-like monster, murdered them all himself, except for Will whom he manipulated into building a time-machine so he could go back in time and take over the world with his army of spiders.]]
* {{Narm}}: "I love you, wife."
** Or NarmCharm depending on your mood.
* NightmareFuel: The spiders, full stop. [[FridgeHorror And the fact that they have the ability to travel through deep space.]]
* NightmareRetardant: Spider Smith.
** Still [[NightmareFuel pretty damn terrifying]] for a little kid.
* SpecialEffectFailure: Blarp the CGI spider monkey, as well as Dr. Smith's alien-spider form.
* TearJerker: The near loss of the Robot as he's swarmed by the spiders aboard the Proteus, sure he'd tried to kill the Robinsons earlier but that wasn't his fault.
* WhatAnIdiot: In the movie, [[spoiler: John discovered Future-Will had built a working time machine with enough power for a single one-way trip. When he sees his ship along with his family perish in a meteor shower in the atmosphere of the planet, he decides to use the time machine to travel back a few minutes and prevent their deaths. Sounds all well and good, if you don't take into consideration he could've just gone back to the day of the shuttle launch that sent him and his family spiralling through time and space to unknown reaches of the galaxy and prevent the entire plot of the movie. The movie attempts to justify this by having John worry that Will's time machine might destroy Earth, as it was destroying the planet it was built on, but that conclusion was a guess at best, and as a matter of fact Will had already connected to Earth before changing the coordinates.]]
* WhatTheHellCastingAgency: [[Series/{{Friends}} Matt LeBlanc]] as Major West. Although the film's bad enough, [[TookTheBadFilmSeriously and he plays every one-liner so straight,]] that imagining it as something Joey's been cast in [[SoBadItsGood actually improves it quite a lot.]]
** And Creator/HeatherGraham as Judy Robinson! I repeat - HEATHER GRAHAM as a scientist's daughter!!
** A lot of criticism was sent William Hurt's way, who was anchoring a summer effects-laden sci-fi popcorn film and his approach was virtually the same as his very dramatic roles, which didn't help when he needed to deliver wooden dialogue such as "I love you, wife".
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