Ep 1. The Nightmare Man Part 1

The Sarah Jane Adventures is a spin-off of the hit series, Doctor Who. It follows the adventures of Sarah Jane Smith, a former companion of the Doctor, as she investigates strange occurrences and defends Earth against alien threats. In season 4 episode 1, entitled "The Nightmare Man Part 1," Sarah Jane and her team of teenage investigators find themselves up against a mysterious figure known only as the Nightmare Man.

The episode begins with Sarah Jane's son, Luke, having a nightmare about the Nightmare Man. Sarah Jane, Luke, and their team of young investigators -- Clyde, Rani, and new addition Sky -- gather at Sarah Jane's house to discuss the strange goings-on in the area. Numerous people have reported seeing a figure in their dreams and waking up with unexplainable injuries. Sarah Jane and her team suspect that an alien presence is responsible for these disturbances.

As they investigate, they discover that there have been a number of disappearances in the area over the past few months, and they begin to suspect that the Nightmare Man is involved. They also encounter a strange device that seems to be transmitting signals into people's dreams. The team manages to track down the device to a nearby industrial complex and infiltrate it, but they are confronted by the Nightmare Man and his minions.

The episode ends on a cliffhanger as the Nightmare Man captures Sarah Jane and Sky, leaving the rest of the team to fend for themselves and try to rescue their friends.

Overall, "The Nightmare Man Part 1" sets up an intriguing mystery and introduces a new antagonist for Sarah Jane and her team to face. The episode is full of suspense and action, and it leaves the audience eager to see how the story will unfold in the next episode.