Lost in Space Trivia
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99 free Lost in Space trivia questions with answers — entertainment quiz, new questions added Oct 2026.
Lost in Space has been stranding the Robinson family since 1965, first on CBS, then in a 1998 movie that knocked Titanic off the top of the box office, and most recently across three seasons on Netflix. This quiz covers all of it: Irwin Allen's original with Guy Williams, June Lockhart, Bill Mumy, Jonathan Harris and the Robot; the Jupiter 2, the Chariot and Priplanus; the 1998 film with Gary Oldman, William Hurt and Matt LeBlanc; and the 2018 reboot with Molly Parker, Toby Stephens and Parker Posey. Easy questions ask which family gets lost, what the Robot's famous warning is and who plays Dr. Smith in the movie. Harder ones dig into the unaired pilot's ship name, Dr. Smith's spy code name, the talking carrot episode, why Guy Williams quit acting, which Star Wars composer wrote the theme, and how the Netflix show hid tributes to the original cast in its character names. Every answer has been checked against Wikipedia's articles on the series, the film, the reboot and the cast, and each question shows its source once you have answered.
30 of 99 questions with answers and explanations. Play the quiz
Q 01Which 1812 novel inspired the original Lost in Space?
The Swiss Family Robinson
The Swiss Family Robinson also inspired a 1962 comic, Space Family Robinson, which got to the idea first and forced the show to find another title.
Q 02Which producer, later nicknamed the 'Master of Disaster', created the original Lost in Space?
Irwin Allen
Irwin Allen went on to make The Poseidon Adventure and The Towering Inferno, and swapped monster suits between Lost in Space and his submarine series.
Q 03On which network did the original Lost in Space air from 1965 to 1968?
CBS
CBS bought the series before Dr. Smith or the Robot existed: both were added after the pilot, which had neither.
Q 04What is the name of the Robinsons' saucer-shaped spacecraft in Lost in Space?
Jupiter 2
Jupiter 2 goes astray because Dr. Smith sabotages it and is then trapped aboard as a stowaway.
Q 05Which star system is the Robinsons' intended destination in Lost in Space?
Alpha Centauri
Alpha Centauri was to be reached with the family frozen in suspended animation, and the colonists of the 2018 reboot are bound for the same star.
Q 06What was the Robinsons' ship called in the unaired pilot of Lost in Space?
Gemini 12
Gemini 12 flew in a pilot that had no Dr. Smith and no Robot, and that was never broadcast during the show's run.
Q 07What set Lost in Space's first season apart from the later two?
It was in black and white
It was in black and white, and it is the season the makers of the 2018 reboot say they took as their model.
Q 08Which earlier movie robot, from the same designer, turned up in an episode of the original Lost in Space?
Robby
Robby, the star machine of Forbidden Planet, plays a rival in 'War of the Robots' that wins the family's trust before the Robinsons' own Robot has to fight it.
Q 09Dr. Smith's best-known insult for the Robot in Lost in Space was 'Bubble-headed' what?
Booby
Booby: Jonathan Harris rewrote his own lines, and his stream of alliterative insults for the Robot turned a short-lived villain into the show's star.
Q 10Which Dr. Smith line did Jonathan Harris later reprise as a praying mantis in A Bug's Life?
'Oh, the pain ... the pain!'
'Oh, the pain ... the pain!' is moaned by Manny the mantis in the film's climax, an in-joke for parents in one of Harris's last roles.
Q 11How was regular cast member Jonathan Harris credited in every episode of Lost in Space?
As 'special guest star'
As 'special guest star', because star billing had already been assigned by contract when he joined, so he negotiated the unusual credit instead.
Q 12Which actor, previously TV's Zorro, played Professor John Robinson in the original Lost in Space?
Guy Williams
Guy Williams found his warmest welcome in Argentina, where Zorro had made him a hero, and he later settled in Buenos Aires for good.
Q 13June Lockhart, who played Maureen Robinson, was already famous as the mother on which other series?
Lassie
Q 21How did early Lost in Space episodes usually end?
A frozen cliffhanger with a caption
A frozen cliffhanger with a caption set up the next week's story for two seasons; the third swapped it for a preview voiced by the Robot.
Q 22Which Boogie Nights star plays Dr. Judy Robinson in the 1998 Lost in Space film?
Heather Graham
Heather Graham made it straight after Boogie Nights, in a cast that found cameos for four stars of the 1960s series.
Q 23Which actress plays the 2018 reboot's version of Dr. Smith in Lost in Space?
Parker Posey
Lassie had made her a familiar television mother, and after Lost in Space she joined Petticoat Junction to fill the gap left by the death of its star, Bea Benaderet.
Q 14Angela Cartwright, Penny in the original Lost in Space, was also one of the children in which film?
The Sound of Music
The Sound of Music cast her as Brigitta von Trapp, and decades later she came back to Lost in Space, playing the mother of Dr. Smith in the 2018 reboot.
Q 15What is the name of Penny Robinson's chimpanzee-like alien pet in Lost in Space?
Debbie
Debbie is better known as 'the Bloop', after the sound it makes, and joins the family in the third episode, 'Island in the Sky'.
Q 16Which composer wrote the theme music for the original Lost in Space?
John Williams
John Williams, then billed as Johnny Williams, wrote it more than a decade before Star Wars, and came back with a new theme for the show's third season.
Q 17On which planet are the Robinsons stranded for the first season of Lost in Space?
Priplanus
Priplanus, as Will names it, is torn apart by earthquakes at the start of season two, which forces the family back into space.
Q 18What was 'the Chariot' in the original Lost in Space?
An amphibious tracked ground vehicle
An amphibious tracked ground vehicle, it was in reality a converted Thiokol Snowcat, a snow tractor with a Ford engine.
Q 19Which rival show, launched in January 1966 in the same slot, pushed Lost in Space toward campy humour?
Batman
Batman arrived on ABC as a camp sensation, and the second season of Lost in Space answered with bright costumes, broad comedy and outlandish villains.
Q 20In the Lost in Space episode 'The Great Vegetable Rebellion', the planet's ruler Tybo is a giant talking what?
Carrot
Carrot: actor Stanley Adams played Tybo, who accuses Dr. Smith of murder for picking a flower.
Parker Posey's Smith is a con artist who steals a doctor's identity, a female take on the role Jonathan Harris made famous.
Q 24Which Lost in Space catchphrase did the Robot use to warn the youngest Robinson of a threat?
'Danger, Will Robinson!'
'Danger, Will Robinson!' became the 1998 film's advertising slogan, and even the address of its official website.
Q 25Which future film star, then a teenage actor, guest-starred in Lost in Space as an alien ruler's son?
Kurt Russell
Kurt Russell played Quano, a warrior ruler's son who picks Will as his opponent in a contest of strength, in the 1966 episode 'The Challenge'.
Q 26Who plays Dr. Zachary Smith in the 1998 Lost in Space film?
Gary Oldman
Gary Oldman's villain earned a Saturn Award nomination, even though critics panned the film around him.
Q 27Which sitcom star plays hotshot pilot Major Don West in the 1998 Lost in Space film?
Matt LeBlanc
Matt LeBlanc made it during his Friends years, as a fighter pilot drafted in at the last minute to fly the Robinsons' ship.
Q 28Which Oscar winner plays Professor John Robinson in the 1998 Lost in Space film?
William Hurt
William Hurt's professor leads a family mission meant to save humanity from a dying Earth, in a film that opened at number one in the US.
Q 29Which future Mean Girls actress plays Penny Robinson in the 1998 Lost in Space film?
Lacey Chabert
Lacey Chabert took over a role created by Angela Cartwright, who turns up in the 1998 film herself, as a reporter.
Q 30The 1998 Lost in Space film's opening weekend ended which movie's 15-week run at number one in the US?
Titanic
Titanic finally lost the top spot to a $20 million opening, but Lost in Space held it for just one weekend before City of Angels took over.