Ep 4. Aliens of London

The Doctor, played by Christopher Eccleston, and his companion Rose Tyler, played by Billie Piper, have just returned to present-day London after their adventures in space and time. However, something strange is happening as a spaceship crashes into the Thames, causing chaos and confusion.

The episode begins with news reports of the spaceship crash, which is believed to have been caused by a meteorite. However, when the Doctor and Rose investigate the crash site, they realize that it was not a meteorite but an alien spacecraft. They manage to sneak into the hospital where the alien pilot is being treated, and the Doctor is shocked to discover that the alien is actually a pig.

As the investigation into the crash continues, it becomes clear that the British government is hiding something from the public. The Doctor and Rose meet with a government official named Harriet Jones, who reveals that the spaceship crash was not an isolated incident. In fact, there have been several other spaceships over the years that were covered up and kept secret from the public.

Suddenly, London is hit by a massive UFO invasion, and the Doctor and Rose find themselves in the middle of a battle between the aliens and the British military. The aliens are revealed to be creatures called the Slitheen, who are using their shape-shifting abilities to infiltrate the British government. They plan to launch a missile at the heart of London, which will destroy the city and allow them to sell the radioactive remains to other planets.

As the Doctor and Rose try to stop the Slitheen from carrying out their plans, they are joined by Harriet Jones and a group of other officials who are working to expose the truth to the public. The Doctor also teams up with a UNIT soldier named Captain Jack Harkness, who brings a new energy and humor to the episode.

Overall, "Aliens of London" is a thrilling and action-packed episode that showcases the strengths of the show's cast and special effects. It also sets up the ongoing story arc of the Slitheen and their attempts to take over Earth. Fans of science fiction and adventure will find plenty to love in this exciting episode.