Ep 1. For Your Ice Only / Happy New Year!

For Your Ice Only / Happy New Year! is the first episode of the fourth and final season of the American animated television series called Phineas and Ferb.

In this episode, the titular characters Phineas Flynn and Ferb Fletcher decide to host an ice skating tournament called "The Skate-tacular". This tournament is meant to promote international friendship and good will and is open to all participants, regardless of their skill level. They build a special skating rink in their backyard and invite friends and family to participate. Candace, Phineas' older sister, is determined to bust her brothers and prove that they are up to something, as she believes their projects are always suspicious.

Meanwhile, Agent P, the secret agent platypus, is on a mission to foil the evil Dr. Doofenshmirtz's latest scheme to destroy the Skate-tacular by freezing the skating rink. The episode has the usual format of Phineas and Ferb episodes, with one story focusing on the two brothers and their friends, and another focusing on Perry and his nemesis Dr. Doofenshmirtz.

The second story focuses on Dr. Doofenshmirtz's resolve to create his own New Year's traditions. Being upset about the commercialization of the holiday, he decides to create a new event, called Doofenshmirtz's Daily Dirt, which he hopes will outlast any established traditions. He also plans to unveil an "Inator" machine that will freeze the entire Tri-State Area so that everyone will have to celebrate his new holiday instead of New Year's Day.

Perry must once again find a way to stop Dr. Doofenshmirtz's evil plan. In this episode, he teams up with a new partner - Peter the Panda - who is also a secret agent working for a different agency. Together, they embark on a mission to stop the evil Dr. Doofenshmirtz and save the Tri-State Area.

The two storylines in For Your Ice Only / Happy New Year! run parallel to each other, with little interaction between the characters from each story. The episode has all the usual elements that fans of Phineas and Ferb have come to love, such as catchy songs, humorous dialogue, and bizarre inventions. The two stories are wrapped up neatly, with both Phineas and Ferb's Skate-tacular and Dr. Doofenshmirtz's Daily Dirt ultimately being a success.

Overall, For Your Ice Only / Happy New Year! is a perfect introduction to the final season of Phineas and Ferb. It showcases the show's unique blend of humor, creativity, and heart that has made it a favorite among audiences of all ages.