Ep 1. Mini-Maximum Trouble

In the season 4 premiere of Big Hero 6 The Series, titled "Mini-Maximum Trouble," our favorite group of teen superheroes return to face their biggest challenge yet. The episode opens with Hiro, Baymax, and the rest of the crew trying to stop a rogue robot from wreaking havoc in San Fransokyo.

As they try to contain the situation, Hiro discovers a tiny robot named Mini-Max, who has somehow managed to escape from Krei Tech Industries. Despite being small in size, Mini-Max has incredible strength and is equipped with an arsenal of high-tech weapons. He quickly becomes an asset to the team, helping them take down the rogue robot.

However, Mini-Max's creator, Hiro's former rival Karmi, comes looking for him and demands his return. Karmi is convinced that Mini-Max is the key to winning the prestigious San Fransokyo Tech Showcase, and believes that Hiro has stolen him in an attempt to sabotage her chances of winning.

As Hiro and the team try to convince Karmi that they have no intention of using Mini-Max for their own gain, they soon realize that Karmi may be right about one thing – someone else is after Mini-Max. A group of mysterious scientists are determined to get their hands on the tiny robot, and will stop at nothing to achieve their goal.

The team must work together to protect Mini-Max and stop the rogue scientists from carrying out their dangerous plans. Along the way, they discover that Mini-Max has some surprising secrets of his own, and that he may be more than just a miniature robot.

"Mini-Maximum Trouble" is an action-packed episode that introduces some exciting new characters and sets the stage for what promises to be an epic season. Fans of the show will be delighted to see their favorite characters back in action, as well as some surprising developments that will keep them on the edge of their seats.

With its stunning animation, lovable characters, and exciting plotlines, Big Hero 6 The Series continues to be one of the most entertaining and engaging shows on television. If the first episode of season 4 is anything to go by, fans are in for a treat as the team faces its biggest challenges yet.