Season 1

Title Description Original Air Date Characters Introduced
The Freedom Fighters Eggman creates a giant Sonic-shaped robot that he calls the Mecha Sonic. Can the Freedom Fighters destroy the robot before it can destroy the city? 2015 Sonic the Hedgehog, Miles "Tails" Prower, Sally Acorn, Knuckles the Echidna, Dr. Eggman, Mecha Sonic, Rabbot, several robots
Big's Bombastic Journey Eggman successfully captures the Freedom Fighters, and Big has to save them! 2015 Big the Cat
Espio by Night Espio tells Sonic the story of how he was recruited to the Freedom Fighters. 2015 Espio the Chameleon
Eggman for a Day Eggman is sick, and E-123 Omega offers to take his place for a day- but chaos strikes when a robot turns rogue. 2015 E-123 Omega
Roses are Red E-123 Omega repossesses Amy, and it's Rabbot's job to save her. 2015 Amy Rose
Wisp Away! Eggman gives up trying to take over Earth and heads to Planet Wisp, so Sonic tries to defeat him in space before he can even get to the planet. 2015 Mother Wisp, several Wisps
Doomsday Dr. Eggman successfully takes over the universe, but still can't "roboticize" Sonic. Can Sonic save everybody, or will he fail? 2015 None
Bad Timing After nearly freeing Tails from being completely roboticized (his head being the only non-robotic part), Tails invents a time machine so Sonic can go back in time and stop Dr. Eggman's success in making the world become Eggmanland. 2015 None
Sonic Times Two Sonic accidentally meets the Past Sonic, creating a paradox where Eggman succeeded every time he did something, and both Sonics have to defeat him. 2015 Sonic the Hedgehog (past)
Happy New Year When Sonic finally returns to the present and has stopped the paradox, he discovers that the present day is a year after he left. Apparently, Dr. Eggman has rebuilt a giant Mecha Sonic, and Planet Wisp has lost its orbit and fallen onto Earth. 2015 Miles "Tails" Prower (future), Knuckles the Echidna (future), Amy Rose (future), Sally Acorn (future), Big the Cat (future), Rabbot (future), Espio the Chameleon (future), Dr. Eggman (future), E-123 Omega (future), Mecha Sonic (future), Mother Wisp (future), several robots (future), several Wisps (future)

Note: This is the first episode to include the entire cast from every previous episode in the series. However, they are all from the future (except for Sonic).

Chaotic Chaotix The Chaotix has two members, and in search for new members, Knuckles' echidna tribe mistakenly attacks them. Knuckles and Espio go to defeat the Chaotix, but they instead get recruited to them and must find a way to defeat the tribe. 2015 Vector the Crocodile, Charmy Bee, Tikal the Echidna
Scourge: Fight for (No) Freedom A green hedgehog named Scourge who doesn't get along with Sonic joins the Freedom Fighters, but he is actually working for Dr. Eggman, but Sonic gets fired when he tells the group that Scourge is evil, as they think he is just trying to get him off the team. Sonic must then prove that Scourge is evil, and he teams up with another former member of the Freedom Fighters named Rotor to do so. 2015 Scourge the Hedgehog, Rotor the Walrus
Rotor the Walrus Rotor asks Sonic if he can come back to the team, and the Freedom Fighters agree to let him back in- if he can successfully infiltrate Dr. Eggman's base. 2015 None
Fourteen Sonic and Tails are trapped in the tallest building in the world, and they only have one warning: "Fourteen, fifteen, sixteen." 2015 None
Fifteen With fourteen robots surrounding them, Sonic tries to think about how they got stuck in the building, and what the number fifteen is. 2015 None
Sixteen Now that fifteen of the Dr. Eggman clones have been defeated, the sixteenth clone remains still in the building, and they must find a way to escape before the clone does. 2015 None
Sonny the Human Sonny the Human wakes up in the middle of the night, and tells his friends that he's been dreaming that they were all anthropomorphic animals trying to defeat an evil human named Dr. Eggman, who is based off of Rebecca's chicken. 2015 Sonny Hedgehog, Miles Prower (human), Rebecca Rabbit, Sally Acorn (human), Iggy "Ig" Catt, Amy Rose (human), Eggy the Chicken, Knocks Echidna, Ron Walrus, "S.P.O.," E. Onetwo Three-Omega, Victor "Crocodile," Charm E.B.
Santa: Night for Christmas Santa Claus crashes into Dr. Eggman's base, where he is roboticized, and the Freedom Fighters must stop him and save Christmas before it's too late. 2015 Santa Claus
Silver Sonic Dr. Eggman rebuilds Mecha Sonic... But he is now giant, and called the Silver Sonic. He will crush the city if the Freedom Fighters cannot stop him! 2016 Silver Sonic
Eggs for Breakfast Dr. Eggman gives up evil and starts... A cooking show? 2016 Chaos
Knuckles' Chaotix The Chaotix and the Freedom Fighters team up to defeat a major threat to them, the city, and Dr. Eggman's Cooking Show. Can they defeat it? 2016 None
The Nonexistent Hedgehog What would happen if Tails never met Sonic? How would the world handle Dr. Eggman, Mecha Sonic, and Scourge? 2016 None
Shadow the Hedgehog 50 years ago, a mysterious hedgehog named Shadow and a girl named Maria lived on Space Colony ARK. But what happened up there in space? 2016 None

Note: This episode was a prequel to the film, Sonic the Hedgehog: Shadow's Curse. It was counted as Episode 21.5, was only shown once on television, and is included as an extra in the DVD for the full Season 1.

Return of the Eggman Dr. Eggman's Cooking Show is going absolutely nowhere... So he returns to evil. However, there's an even bigger problem... One of his minions is changing into something big. 2016 None

Note: This was Part 1 of two hour-long episodes.

Perfect Chaos Chaos has transformed into Perfect Chaos, and Dr. Eggman and Sonic must both team up... But the Chaos Emeralds are still nowhere to be found. Will they need even stronger allies than each other? 2016 None

Note: Knuckles and Espio rejoin The Freedom Fighters in this episode, but claim they will still go to the Chaotix team when they need help.