While investigating the Serf board computer in The Man Who Never Was, Sky accompanies Sarah Jane and Luke to the Serf factory for a practice press launch. While there, along with Luke, she spots Mr. Serf flickering, something everyone else misses and only seen by Sky due to her sensitivity to electrical fluctuations, and Luke because of his acute senses. After telling Sarah Jane, she helps Mr. Smith find video evidence of the glitch when the others are skeptical. She accompanies Sarah Jane again back to the factory, where she rejoins Luke while Sarah Jane has an interview with Mr. Serf. While looking round, she feels electrical fluctuations taking place below her and heads down in the lift, along with an irritated Luke. Once at the bottom level, they discover the technology generating Mr. Serf and the people behind it. They are discovered when Luke notices Sarah Jane in trouble on the screen, however the aliens, slaves called Skullions, warn them to leave. Harrison, the man behind the Skullions slavery and the company itself, captures Sky and Luke and locks them up, separate from Sarah Jane. Sky throughout shows compassion towards the Skullions and revulsion at what was done to them, and tries to persuade one when he delivers food and water to them. She thinks of the idea to use K9's dog whistle to broadcast a Morse code message to Mr. Smith, who passes it on to Clyde and Rani. She helps free the Scullions, but has to operate the Serf hologram along with Luke when Harrison retrieves his pen controlling the Skullions torturing devices. By using the hypnotic Serf hologram, she manages to destroy the pen and deactivate the hologram. Throughout the story, Sky deals with emotions related to meeting Luke in person, and doubts as to her importance, however this is resolved at the end of the episode with Luke fully appreciating her and recognizing her room and role as his sister.
