S3 E1 • Retour sur Mewni

Star returns to her home dimension of Mewni where she discovers that magic is disappearing throughout the kingdom. She must dig deep and challenge archnemesis Ludo in an effort to save her family and kingdom.

Première diffusion : 15 juillet 2017

S3 E2 • Moon la téméraire

Queen Moon shares her story of when she was a teenager and her mother (Star's grandmother) had died. She had to decide between signing a peace treaty or going to war against the monster army, led by "The Lizard". She partly melts the ice encasing Eclipsa, to learn some dark magic from the forbidden section of the Book of Spells. She confronts The Lizard (Toffee) and uses the dark magic to sever his finger, which he is unable to regenerate. Toffee flees.

Première diffusion : 15 juillet 2017

S3 E3 • Ludo n'a pas voix au chapitre

Ludo finds that his wand is now embedded into his hand. He finds Glossaryck, who tells them that the Magic High Commission has been defeated. Ludo wants to celebrate by writing his story into the Book of Spells, but the book will not let him, as he is not the owner of the book anymore. Despite multiple attempts, he is unable to write into the book until he throws the book into the fire, at which it burns up (and Glossaryck along with it).

Première diffusion : 15 juillet 2017

S3 E4 • Marco et le roi

King River tries to take care of the kingdom by partying it up every day, but he and his subjects wear down quickly. Marco arrives, but River has to deal with angry villagers as well as a large monster who approaches the castle after he yelled at it to leave. River tries to hide, but Marco encourages him to stand up to the monster. River rallies the villagers to fight the monster, and it is revealed that the monster thought River was beckoning it to come to the castle, not to go away. It leaves peacefully, but as River is about to have a party to celebrate, Ludo and his minions appear and take over the kingdom.

Première diffusion : 15 juillet 2017

S3 E5 • Battre en retraite

With the sanctuary all sludged up, Star and her mom flee and find a new hiding place at Buff Frog's. Star wants to sneak out to fight, so she gets Buff Frog to distract her mom with some Mewnian board games such as Puddle Defender, which Buff and Moon find have a biased perspective towards the monsters instead of the Mewnians. After a heated argument, Buff Frog sides with Queen Butterfly and forbids Star from leaving. However, Buff's youngest tadpole Katerina later sneaks Star out.

Première diffusion : 15 juillet 2017

S3 E6 • Le Roi Ludo

Ludo has taken over the kingdom, and has imprisoned Marco and River, but he finds that he is not popular at all among the kingdom's villagers. He tells River to make him popular or else he will levitate him into the sky. Marco uses a stick of butter that Ludo left to free himself, but River has eaten his part of the butter so Marco has to steal Ludo's key. He meets with some of the court entertainers, and they steal the key, but River refuses to escape. Ludo levitates River into the skies while Marco and the entertainers conspire what to do next.

Première diffusion : 15 juillet 2017

S3 E7 • Résistance

King Ludo's reign reaches as a tipping point as Star returns to the castle. Star must summon her strength to save her family and the kingdom.

Première diffusion : 15 juillet 2017

S3 E8 • Une odeur familière

Star goes to the Royal Laundry, and meets the Knight of the Wash.

Première diffusion : 6 novembre 2017

S3 E9 • Le fantôme de Glossaryck

Star continues to have recurring visions of Glossaryck and believe he is haunting her.

Première diffusion : 6 novembre 2017

S3 E10 • Duel de danse

Tom snubs Star at the Silver Bell Ball.

Première diffusion : 7 novembre 2017

S3 E11 • Une dangereuse rencontre

Star meets the ancient Queen Eclipsa.

Première diffusion : 7 novembre 2017

S3 E12 • Chasseur de démons

Star and Tom's friendship is put to the test when Tom decides to get rid of his demons.

Première diffusion : 8 novembre 2017

S3 E13 • Nostalgie de Miouni

Marco decides to put in a full effort to living life in the present on Earth.

Première diffusion : 8 novembre 2017

S3 E14 • L'écuyer du chevalier de la laverie

Knight of the wash, Sir Lavabo, gets a familiar squire.

Première diffusion : 9 novembre 2017

S3 E15 • Esprit de compétition

Star prepares for the Midnight Warrior Blowout Sale at Quest Buy.

Première diffusion : 9 novembre 2017

S3 E16 • Princesse Turdina

A surprise visitor pressures Marco to reveal Turdina's true identity.

Première diffusion : 13 novembre 2017

S3 E17 • L'experte en monstres

Star goes out into the field to understand why Mewmans treat Monsters unfairly.

Première diffusion : 13 novembre 2017

S3 E18 • Les beaux rêves B

Star discovers she travels through multiple dimensions in her dreams.

Première diffusion : 14 novembre 2017

S3 E19 • La plage du Monde Souterrain

Kelly breaks up with her boyfriend and Marco questions his friendship with Star Butterfly.

Première diffusion : 14 novembre 2017

S3 E20 • La pétition de l'amitié

Star urges the royal youth of Mewni to sign a petition calling for the equal treatment of Monsters.

Première diffusion : 15 novembre 2017

S3 E21 • Le complot des Sœurs Licornes

Star is thrilled when Ponyhead invites her to dinner with her sisters.

Première diffusion : 15 novembre 2017

S3 E22 • Double vie

Star learns that Marco and Hekapoo have been dealing with rogue interdimensional portals.

Première diffusion : 16 novembre 2017

S3 E23 • Star sous hypnose

Star learns that Marco and Hekapoo have been dealing with rogue interdimensional portals.

Première diffusion : 16 novembre 2017

S3 E24 • Une fête monstrueuse

All the youth of Mewni gather at the ancient Monster Temple to celebrate a new era of Monsters and Mewmans living together in peace, until guests start disappearing!

Première diffusion : 16 novembre 2017

S3 E25 • La fête de la souche

Star, Marco and the rest of Mewni celebrate a special snowy holiday, "Stump Day".

Première diffusion : 2 décembre 2017

S3 E26 • L'œil qui voit tout

Spider with a Top Hat invites one of Eclipsa’s dark spells to the office holiday party.

Première diffusion : 2 décembre 2017

S3 E1 • TBA

TBA

Première diffusion : 15 juillet 2017

S3 E27 • Le monstre du marais de Boggabah

King River interrupts Star's eager investigation into Eclipsa's past and demands her help on a dangerous hunt

Première diffusion : 3 mars 2018

S3 E28 • Secret défense

Moon enlists Eclipsa herself to access Mewni's most guarded records

Première diffusion : 3 mars 2018

S3 E29 • Le procès par boîte

Moon and the Magical High Commission put Eclipsa on trial for her evil past with Star as a key witness.

Première diffusion : 10 mars 2018

S3 E30 • Recherche Ludo desespérément

Dennis goes on a dangerous journey to find Ludo living in another dimension.

Première diffusion : 10 mars 2018

S3 E31 • Le départ de Krapotoro

Buffrog leaves Mewni in search for a better life, and Star goes to look for him.

Première diffusion : 17 mars 2018

S3 E32 • Marco Junior

Marco returns to Echo Creek to discover that his mom is pregnant.

Première diffusion : 17 mars 2018

S3 E33 • Le retour de Tête de Licorne

Ponyhead returns to St. O’s and finds that the curriculum got tougher.

Première diffusion : 24 mars 2018

S3 E34 • La cabine à photos

A magical photo booth at a wedding goes on the fritz and captures Star and Marco inside

Première diffusion : 24 mars 2018

S3 E35 • La force de se battre

Ponyhead shuts herself away to watch the finale of her favorite Korean Drama

Première diffusion : 31 mars 2018

S3 E36 • De la haine à l'amour

Eclipsa and Moon bring Princess Meteora home peacefully after the massive destruction she's caused.

Première diffusion : 31 mars 2018

S3 E37 • Diviser pour mieux régner

Star becomes acting Queen and plans for Marco and his warriors to delay Meteora from reaching Castle Butterfly long enough for Star to find Moon and destroy the monster princess.

Première diffusion : 7 avril 2018

S3 E38 • La rage de vaincre

Star must find the courage to face Meteora alone and make a decision that will change the kingdom forever.

Première diffusion : 7 avril 2018

S3 E39 • Delet This

Season 3 ends with 38 episodes, no 39.