Ep 4. Ultraman Tiga: S1 E4 - GOODBYE, Planet Earth

Ultraman Tiga: S1 E4 - GOODBYE, Planet Earth introduces viewers to a new character named Megumi Iruma, a skilled detective and former colleague of Daigo's. Megumi is investigating a series of mysterious disappearances in the city, and her investigation leads her to an abandoned laboratory. There, she discovers a sinister plot by an alien race to destroy planet Earth and harvest its resources.

Meanwhile, Daigo and his colleagues are called to investigate a large crater that has appeared in the middle of the city. As they examine the site, they are suddenly attacked by a powerful creature, which they soon discover is a bio-engineered monster created by the aliens. Daigo transforms into Ultraman Tiga to stop the creature, but he soon realizes that this is only the beginning of a much larger threat.

As Megumi and Daigo work together to uncover the aliens' plans, they discover that the destruction of Earth is imminent, and that they must act quickly to stop it. However, the aliens are more powerful than they anticipated, and they soon find themselves in a race against time to save the planet.

Ultraman Tiga: S1 E4 - GOODBYE, Planet Earth is a thrilling episode filled with action, suspense, and drama. It introduces new characters and reveals more about the larger story arc of the series. Fans of the Ultraman franchise will not want to miss this exciting installment.