Madame Odius returns to Earth to track down the Ninja Nexus Prism after Sledge and his crew made their unexpected return from Dino Charge. As she arrives with the intent of fixing the Prism and turning it evil but is frustrated by the Rangers.
Calvin forgets his Anniversary to Hayley and covers up his mistake, but begins to regret his decision not to tell the truth. The web of lies also boosts the strength of this weeks contestant, Deceptron, whose bolts prevents the rangers from using their powers.
Levi meets a street performer and tries to change himself to impress her, unaware that she's a monster trying to turn him evil.
Doomwave, an aquatic monster, creates a tidal wave generator, intent on destroying Summer Cove. Hayley and Sarah are worried about their parents dating, but their project just might help.
The students of Summer Cove come under the influence of a new video game, unaware that the monster inside is using their high scores to super charge himself and trap the Rangers. Now Mick and Levi have to figure out how to get the other rangers out.
The Rangers are attacked by the new, mysterious group called the Galactic Ninjas, beginning with their leader Wolvermean when he steals Preston, Hayley, Brody and Sarah's memories of being ninja rangers.
Sarah tries to break the record for the fastest hover board by using strange, alien technology left behind by Galactic Ninja Speedwing.
Brody is accused of stealing something from one of his teachers. At the end, the Rangers are attacked by Madame Odius' evil Zord, the Foxatron, after Galactic Ninja Rygore is destroyed, and Venoma is forced to give Odius the ninja medallions.
After their Zords are disabled by Odius giant Foxatron, the Rangers must find a way to call forth the new Ninja Blaze Megazord.
In a very special 25th Anniversary episode, the Super Ninja Steel Rangers team up with Legendary Rangers from the past 2 decades in an epic battle to save the world when a new monster known as Lord Draven tries to steal ranger powers to create his own army of evil clones. Leading the charge is none other than Time Force Red Ranger Wesley Collins, RPM Silver Ranger Gemma, Blue Dino Charge Ranger Koda, and Tommy Oliver himself. The past rangers that Lord Draven is keeping capture to make copies of evil clones of are Rocky DeSantos (second Red Mighty Morphin Ranger), Katherine Hillard (first Pink Turbo Ranger), T.J. Johnson (Blue Space Ranger), Trent Fernandez (White Dino Thunder Ranger), Antonio Garcia (Gold Samurai Ranger), and Gia Moran (Yellow Megaforce Ranger).
Preston learns not to believe everything he hears when Victor tells him Sandy doesn't want to go to the Valentine's Day Dance with anyone. At the same time, the last of the Galactic Ninjas, Venoma, infects the other male members of the rangers with a love inducing venom.
Dreadwolf attempts to transform the Power Rangers, and one of Levi's fans, into werewolves, and Levi becomes overwhelmed by an overzealous fan.
Sarah and the teams overconfidence puts them all at risk. The Rangers meet and fight a new enemy, Brax.
Madame Odius asks Sheriff Skyfire to fight the Rangers who "stole" the Ninja Nexus Prism. The Sheriff realizes that she has lied to him and decides, as an officer of the space police, to fight alongside the Rangers.
Brody gives karate lessons to Emma, a computer specialist who dreams of fighting alongside the Power Rangers. At the same time, Typeface, a new monster sent by Madame Odius, is trying to render the Power Rangers weapons inoperative by means of a computer virus.
A new monster Voltipede is sent to Earth to fight the Super Ninja Steel Rangers. It steals electricity from cars and the city, to charge itself with energy and power. He is a formidable adversary, but the rangers helped by the Lion Fire Zord, manage to defeat him.
Thanks to the Ninja Power Star he stole, Tynamon thinks he can defeat the Super Ninja Steel Rangers. But, the Power Stars only react to a Super Ninja Steel Rangers voice. So, he decides to steal the voice of a Ranger, which will be Levi.
Tynamon asks Madame Odius to make him grow. She accepts but only if he can capture Mick and defeat the Super Ninja Steel Rangers. She gives him a weapon which can put the victim under her control. Thanks to this he can capture Mick. Madame Odius wants to use him for her ultimate plan.
Madame Odius hosts auditions for a new Galaxy Warriors TV show that will manipulate the minds of its audience worldwide.
After merging with the Ninja Nexus Prism, Madame Odius reaches her ultimate form, and presents the Rangers with their final test.
The Rangers are ambushed by Versix and monsters who switch bodies with them on Halloween.
The Rangers look to celebrate Christmas, but find their holiday cheer interrupted by Sledge. Preston reunites with Koda to put an end of Sledge and his crew.