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50 free The 100 trivia questions with answers. The 100 ran for seven seasons and exactly 100 episodes on the CW, from a dropship full of juvenile delinquents in 2014 to a species-wide test for Transcendence in 2020. This quiz walks the whole arc: the dying Ark and its floated criminals, the Grounder clans and their invented language, the Mountain Men and their bone-marrow harvest, A.L.I.E. and the City of Light, the second death wave, the bunker, the Eligius prisoners, the Primes of Sanctum and the Disciples of Bardo. Easy questions cover the network, the cast and the big plot beats; harder ones dig into who really killed whom, the origins of the Grounders revealed in the prequel episode, the actors' earlier soap-opera lives, and the 'bury your gays' backlash that followed Lexa's death. It suits anyone who binged the show, argues about the finale, or just wants to know how much they remember of Wanheda, Blodreina and the rest. Every answer was checked against Wikipedia and other published sources, and the citation sits under each question, so you can settle any disagreement in the group chat.
30 of 50 questions with answers and explanations. Play the quiz
Q 01The 100 aired on which American network from 2014 to 2020?
The CW
It became the network's most-watched show in its time slot since Life Unexpected in 2010, drawing an estimated 2.7 million viewers for its premiere.
Q 02In which year did the series premiere?
2014
The pilot was shot in the second quarter of 2013, but the show did not reach screens until March 19 of the following year.
Q 03Who developed the series for television and served as its showrunner?
Jason Rothenberg
He wrote 16 of the show's 100 episodes and also directed the series finale, 'The Last War'.
Q 04The show is based on a young adult novel series by which author?
Kass Morgan
The pen name belongs to Mallory Kass, a Scholastic senior editor who later appeared as a Jeopardy! contestant in 2022.
Q 05How many years after the nuclear apocalypse does the series begin?
97
Three generations had been born aboard the orbiting Ark by then, and its failing life support is what forces the gamble of sending prisoners to the ground.
Q 06How many episodes did the show run in total across its seven seasons?
100
The final season was deliberately given 16 episodes so the tally would land exactly on the show's title.
Q 07Filming for the series took place in and around which city?
Vancouver
Production of the seventh season wrapped on March 14, 2020, just as Warner Bros. shut down all its shows for the COVID-19 pandemic.
Q 08Which linguist created Trigedasleng for The 100, as well as Dothraki for Game of Thrones?
David J. Peterson
Because 97 years is too short for real language change, he posited that the early Grounders used a deliberate cant to tell friend from foe.
Q 09Which Australian actress plays Clarke Griffin?
Eliza Taylor
She never formally auditioned: producers saw an old film audition tape and called her in for a reading the next day, just as she was about to give up on Los Angeles.
Q 10Which actor plays Bellamy Blake?
Bob Morley
He was one of the first two actors cast, in late February 2013, and grew up on a farm in Kyneton, Victoria.
Q 11Which actress was cast in season two as Commander Lexa?
Alycia Debnam-Carey
She was already on the producers' radar from the Clarke casting search, and simultaneously landed Alicia Clark on Fear the Walking Dead.
Q 12Lexa was killed off in which third-season episode, igniting the 'bury your gays' backlash?
"Thirteen"
The episode that followed was the lowest-rated in the show's history as fans organised under 'Lexa Deserved Better' instead of watching.
Q 13Who fired the stray bullet that killed Lexa?
Titus
Her Flamekeeper had meant to shoot Clarke; moments later he cut the Flame from Lexa's neck, revealing how Commanders are chosen.
Q 21In season two, the Mountain Men harvest what from the captured delinquents to survive radiation?
Bone marrow
They had been transfusing Grounder blood for decades; the Ark kids' marrow offered a permanent cure, which made them worth killing.
Q 22How does A.L.I.E. take control of people's minds in season three?
They swallow a chip
The chip removes all pain and links the user to the City of Light, a virtual reality where the dead live on, at the cost of good memories too.
Q 23Who created the A.L.I.E. artificial intelligence?
Becca
Her spirit later guides Clarke through the Flame to hit A.L.I.E.'s kill switch; the Grounders remember her as Pramheda, the First Commander.
Q 14After Lexa's death, fans raised money in her name for which charity?
The Trevor Project
More than $30,000 came in within hours and over $135,000 by that July; the campaign also produced the 'Lexa Pledge' for TV writers.
Q 15Wells Jaha, the Chancellor's son, is murdered in the third episode by whom?
Charlotte
The killer was one of the youngest of the 100, avenging her parents' execution; Murphy was wrongly blamed and nearly lynched for it.
Q 16After wiping out Mount Weather, Clarke earns which Trigedasleng title, meaning 'Commander of Death'?
Wanheda
The name is also rendered as 'Mountain-slayer', and by season three the Ice Nation is hunting her to claim its power.
Q 17As an illegal second child on the Ark, where was Octavia hidden as she grew up?
Under the floor
She was finally caught when her brother sneaked her out to a masked ball, and some delinquents shunned her for being a second child.
Q 18Jasper and Monty were locked up on the Ark for what?
Making illegal substances
Their chemistry know-how later matters: Monty's engineering skills and video logs steer the survivors to a new world.
Q 19Why was John Murphy's father executed on the Ark?
Stealing medical supplies
He was trying to help his sick son; Murphy's mother then drank herself to death while blaming the boy, a backstory he confides to Raven.
Q 20Kelly Hu's Callie Cartwig vanished after the pilot; why was the character dropped?
Budget reasons
Her death happened entirely offscreen, and she was Abby's best friend and the Ark's communications officer for exactly one episode.
Q 24What do the Grounders call the second radiation death wave that ends season four?
Praimfaya
After it, the only habitable place left on Earth is Shallow Valley, where the Eligius prisoners land in 2156.
Q 25Roughly how many people shelter in the fallout bunker as the death wave arrives?
1,200
Clarke stays behind to power up the old Ark remotely and misses her ride to space; only her Nightblood keeps her alive on the surface.
Q 26The bunker where Wonkru survives was built by which doomsday cult?
Second Dawn
Its sigil turns up again on the Disciples' home planet, tying the cult to the Disciples and, eventually, to the man they call the Shepherd.
Q 27What is the name of the prison transport ship whose convicts land in the valley in season five?
Eligius IV
The ship had been mining an asteroid when its captain tried to abandon the prisoners; a sympathetic pilot freed their shock collars.
Q 28As ruler of Wonkru in the bunker, Octavia takes which title, meaning 'the Red Queen'?
Blodreina
Anyone who broke her laws had to fight in deathmatches; after being healed on Sanctum she declares herself 'Blodreina no more'.
Q 29Who launched the Damocles bomb that destroyed the last habitable valley on Earth?
McCreary
It was a scorched-earth act as his army lost; the survivors fled to orbit and went into cryosleep expecting a ten-year wait.
Q 30How long are the survivors in cryosleep before they wake near a new world?
125 years
Only two people stayed awake, grew old and raised a son aboard the ship, whose video logs explain why Earth never recovered.