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"The Domino Effect" is the first segment of the fourth episode of Amphibia. It premiered on June 20, 2019.


Anne wants to keep a caterpillar as a pet, but she'll have to keep it a secret from Hop Pop.


Anne and Sprig are playing outside when they encounter giant wasps attacking a small creature trapped in the mud. After rescuing it, Anne discovers that the creature is a small caterpillar that resembles a cat, specifically Anne's cat Domino from back home. Anne immediately falls in love with the creature despite Sprig's reluctance to take it in, due to Hop Pop's strong stance against keeping pets, but Anne wins him over, dubbing the cat Domino II. Anne asks Hop Pop directly about taking a pet in, but he instead angrily goes off on how Sprig and Polly once had a pet tarantula named Charlie Bigbottom who would cause a mess. While still uncomfortable with Domino II, who has begun licking and "play biting" him, Sprig distracts Hop Pop with stories on Charlie Bigbottom while Anne sneaks the cat in.

The next morning, Sprig goes down to Anne's room to see that it is covered in cobwebs. He notices that Anne is covered in scratch marks from Domino II, but she insists that he is just getting used to the home environment. After spending a day hiding Domino II from Hop Pop and Polly, Domino II takes a nap, only for it to make itself a cocoon. Anne and Sprig start eating upstairs when Hop Pop catches them and demands to know what is happening. After hearing a noise, The three rush downstairs to find that Domino II is missing. Sprig mentions that it was black with white spots and Hop Pop reveals that they have taken in a Coastal Killapillar and that it has transformed in a deadly butterfly. Polly comes down to see what is happening causing Domino II to reacting ferociously.

Despite Anne's efforts in keeping Domino II at bay, the monster begins attacking the Plantars forcing Anne to lead it outside with one of its toys. After getting far away, Anne solemnly tosses its toy into the wild as Domino II leaves for good. Upon coming back, Anne apologizes and Hop Pop breaks down in tears, admitting that he misses Charlie Bigbottom. The next day Anne is cleaning up with Sprig telling her that it is not difficult to take in a wild beast and keep it as a pet (referring to her) and offers a stuffed doll version of Domino II to her which she lovingly hugs.



  • The "cat-a-pillar" was inspired by creator Matt Braly's cat Domino, who he adopted in 2016.[1]
  • Domino II's hatched cocoon resembles the open eggs from the Alien franchise.

International Premieres


Concept and Storybaords



  1. "Disney Channel PR post". Twitter. Retrieved on July 23, 2019.

External links

v - e - d
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AmphibiaChibi Tiny TalesDisney All-Star Racers
Anne BoonchuySprig PlantarPolly PlantarHop Pop PlantarBessieOne-Eyed WallyLeopold LoggleIvy SundewFelicia SundewSylvia SundewMaddie FlourRosemary, Lavender and GingerMr. FlourSadie CroakerStumpyAlbus DuckweedApothecary GaryMayor ToadstoolToadieChuckSasha WaybrightMarcy WuZappapedeBarryCaptain GrimePercyFroboGeneral YunanBog, Fens, and MireLady OliviaKing AndriasJacindaWigbert RibbitonPriscilla PaddockPearl PaddockMr. BoonchuyMrs. BoonchuyMysterious EntityDominoDomino II
Season One: "Anne or Beast?/Best Fronds" • "Cane Crazy/Flood, Sweat & Tears" • "Hop Luck/Stakeout" • "The Domino Effect/Taking Charge" • "Anne Theft Auto/Breakout Star" • "Sprig Vs. Hop Pop/Girl Time" • "Dating Season/Anne Vs. Wild" • "Contagi-Anne/Family Shrub" • "Lily Pad Thai/Plantar's Last Stand" • "Toad Tax/Prison Break" • "Grubhog Day/Hop Pop and Lock" • "Civil Wart/Hop-Popular" • "Croak and Punishment/Trip to the Archives" • "Snow Day/Cracking Mrs. Croaker" • "A Night at the Inn/Wally and Anne" • "Family Fishing Trip/Bizarre Bazaar" • "Cursed!/Fiddle Me This" • "The Big Bugball Game/Combat Camp" • "Children of the Spore/Anne of the Year" • "Reunion"

Season Two: "Handy Anne/Fort in the Road" • "The Ballad of Hopediah Plantar/Anne Hunter" • "Truck Stop Polly/A Caravan Named Desire" • "Quarreler's Pass/Toadcatcher" • "Swamp and Sensibility/Wax Museum" • "Marcy at the Gates" • "Scavenger Hunt/The Plantars Check In" • "Lost in Newtopia/Sprig Gets Schooled" • "Little Frogtown/Hopping Mall" • "The Sleepover to End All Sleepovers/A Day at the Aquarium" • "The Shut-In!" • "Night Drivers/Return to Wartwood" • "Ivy on the Run/After the Rain" • "The First Temple" • "New Wartwood/Friend or Frobo?" • "Toad to Redemption/Maddie & Marcy" • "The Second Temple/Barrel's Warhammer" • "Bessie & MicroAngelo/The Third Temple" • "The Dinner/Battle of the Bands" • "True Colors"
Season Three: "The New Normal" • "Hop 'Til You Drop/Turning Point" • "Thai Feud/Adventures in Catsitting" • "Fight at the Museum/Temple Frogs" • "Fixing Frobo/Anne-sterminator" • "Mr. X/Sprig's Birthday" • "Spider-Sprig/Olivia & Yunan" • "Hollywood Hop Pop/If You Give a Frog a Cookie" • "Froggy Little Christmas"

AmphibiaWartwood SwampToad Tower Newtopia
See also
Welcome to AmphibiaNo Big DealCalamity BoxSuspicious Island