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50 free Lost in Space trivia questions with answers — entertainment quiz, new questions added Aug 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 50 questions with answers and explanations. Play the quiz
Q 01Which 1812 novel inspired the original Lost in Space?
The Swiss Family Robinson
A 1962 Gold Key comic called Space Family Robinson got there first, and legal wrangling let it add 'Lost in Space' as a subtitle.
Q 02Which producer, later nicknamed the 'Master of Disaster', created the original series?
Irwin Allen
He went on to make The Poseidon Adventure and The Towering Inferno, and recycled monster suits between Lost in Space and Voyage to the Bottom of the Sea.
Q 03On which network did the original series air from 1965 to 1968?
CBS
It ran 84 episodes over three seasons; the first was in black and white apart from a few minutes of colour at the end of episode 29.
Q 04What is the name of the Robinsons' saucer-shaped spacecraft?
Jupiter 2
Its two-deck interior was the most expensive TV set of its day at $350,000, which helped get the show cancelled.
Q 05Which star system is the Robinsons' intended destination?
Alpha Centauri
The planned trip was five and a half years with the crew in suspended animation; the 2018 reboot keeps the same destination.
Q 06In the unaired pilot, the ship had a different name. What was it?
Gemini 12
The pilot, 'No Place to Hide', had no Dr. Smith or Robot and wasn't broadcast until a 1997 retrospective; its 98-year journey became five and a half years.
Q 07Under what code name does the saboteur Dr. Smith communicate with his shadowy employers?
Aeolis-14-Umbra
He reprograms the Robot to wreck the ship eight hours after launch, then gets trapped aboard and his extra weight throws it off course.
Q 08What model designation does the Robinsons' Robot carry?
B-9
He has no name at all, though many people wrongly call him Robbie, confusing him with the robot from Forbidden Planet.
Q 09Which of these was NOT one of Dr. Smith's alliterative insults for the Robot?
Rusty Rapscallion
Jonathan Harris said he lay in bed at night dreaming them up; 'Blithering Blatherskyte' and 'Cackling Cacophony' also made the list.
Q 10Which Dr. Smith line did Jonathan Harris later reprise as a praying mantis in A Bug's Life?
'Oh, the pain ... the pain!'
Manny the mantis says it near the end of the Pixar film, one of Harris's last roles.
Q 11How was permanent cast member Jonathan Harris credited in the opening titles of every episode?
As 'special guest star'
Writers meant Smith to be a temporary villain; Harris rewrote his lines into a flamboyant coward and became the show's centre.
Q 12Which actor, previously TV's Zorro, played Professor John Robinson?
Guy Williams
Embittered by the show's campy turn, he retired from acting after it ended and moved to Argentina.
Q 13June Lockhart, who played Maureen Robinson, was already famous as the mother on which other series?
Lassie
She had appeared in Son of Lassie back in 1945 and later joined Petticoat Junction as well.
Q 21How did the first two seasons' episodes typically end?
A freeze-frame with a 'To be continued' caption
Season three switched to the Robot's voice urging viewers to 'stay tuned for scenes from next week's exciting adventure'.
Q 22How much did an episode cost by the third season, up from around $131,000 in season one?
Roughly $165,000
Rising costs are the likeliest reason for cancellation; Allen stormed out when CBS chief Bill Paley demanded a cut of up to 15 percent.
Q 23Which 20th Century Fox film's budget overruns are thought to have led to the cuts that doomed the series?
Cleopatra
Q 14Which of the three Robinson children was the youngest, played by a nine-year-old in season one?
Will
The actor later played Lennier in all five seasons of Babylon 5.
Q 15What is the name of Penny Robinson's chimpanzee-like alien pet?
Debbie
Everyone calls it 'the bloop' after the sound it makes; the 2018 reboot gives Don West a lucky chicken with the same name.
Q 16Which future Star Wars composer wrote the show's theme, credited under a nickname?
John Williams
He wrote a second theme for the third season, and early episodes borrowed Bernard Herrmann's score from The Day the Earth Stood Still.
Q 17What is the name of the planet the ship crash-lands on for all of season one?
Priplanus
The family flees it at the start of season two when earthquakes tear it apart, and promptly crashes on another world.
Q 18What was 'the Chariot' in the series?
An amphibious tracked ground vehicle
It was a cannibalised Thiokol Snowcat with clear body panels, six bucket seats and a rack for four laser rifles.
Q 19Which rival show, launched in January 1966 in the same slot, pushed Lost in Space toward campy humour?
Batman
Mark Goddard and the actor playing John Robinson both hated the shift away from serious science fiction, according to the actor who played Will.
Q 20'The Great Vegetable Rebellion', often called TV's most insipid episode, featured a talking what?
Carrot
Mark Goddard complained that seven years of Stanislavski method acting had led to him talking to it.
Cast and crew had been told the show was renewed for a fourth season before CBS quietly left it off the 1968-69 schedule.
Q 24What catchphrase, later the 1998 film's advertising slogan, did the Robot use to warn the youngest child?
'Danger, Will Robinson!'
The film's official website was even at the address dangerwillrobinson.com.
Q 25Which 2008 TV Land award did the series win?
Awesomest Robot
Its two Emmy nominations, in 1966 and 1968, were both for visual effects and makeup, and it won neither.
Q 26Who plays Dr. Zachary Smith in the 1998 film?
Gary Oldman
He also plays a mutated future 'Spider Smith'; the film was commercially successful but critically panned.
Q 27Which Friends star plays hotshot pilot Major Don West in the 1998 movie?
Matt LeBlanc
He made it between Ed and Charlie's Angels while Friends was at its peak.
Q 28Which Oscar winner plays Professor John Robinson in the 1998 film?
William Hurt
He made it the same year as Dark City and One True Thing; Mimi Rogers plays Maureen and Heather Graham plays Judy.
Q 29Which future Mean Girls actress made her feature debut as Penny Robinson in the 1998 film?
Lacey Chabert
Jack Johnson played Will and Jared Harris played the grown-up future Will.
Q 30The 1998 film's opening weekend famously ended which movie's 15-week run at number one in the US?
Titanic
It opened in a record 3,306 theatres and set an April opening record that stood until The Matrix a year later.