Ep 1. Perfect Day

In the first episode of season 4 of Ben 10, titled "Perfect Day," viewers are welcomed back to the whimsical world of the 10-year-old hero, Ben Tennyson, and his trusty Omnitrix. The episode opens with Ben waking up to what seems like a typical summer day, with the sun shining and birds chirping- however, all is not as it seems.

As the episode progresses, viewers learn that the day is far from perfect, as Ben discovers that he is stuck in a time loop that repeats the same perfect day over and over again. At first, Ben is thrilled with the idea of reliving his perfect day ad-infinitum, but he quickly discovers that there are major ramifications to his never-ending day.

For example, Ben's heroic acts become monotonous, as he saves the same people from the same disasters over and over again. His relationships with his friends and family are also compromised, as he realizes that his loved ones are not able to grow and change, and he is unable to deepen his relationships with them.

As Ben tries to solve the time loop and return to managing the real challenges of the world, viewers are taken on a thrilling adventure that includes everything from heroic feats to goofy antics. Along the way, fans will recognize some of their favorite characters from previous episodes, such as Gwen, Grandpa Max, and Kevin.

At its core, "Perfect Day" is all about how important change and growth are in our lives. Though Ben is thrilled to have a day that starts out perfect, he quickly realizes that the stagnation and monotony of life without change are not fulfilling. The episode leaves all of us with the important message to always embrace change and to never take the adventures that life has to offer for granted.

Overall, "Perfect Day" is a wonderful start to the fourth season of Ben 10. It offers viewers adventure, humor, and heart, all while reinforcing important values and ideas. It is a must-watch for any fan of the franchise and is sure to keep viewers on the edge of their seats from start to finish.