History Recap / TheSarahJaneAdventuresS4E11E12GoodbyeSarahJaneSmith

* SuspiciouslySimilarSubsitute: Ruby villainously attempts to become this for Sarah Jane.

* EmotionEater: Ruby.
* EverythingIsAnIPodInTheFuture: Mr. White

* WeWillMeetAgain: Ruby vows revenge as her ship leaves Earth.

* BigDamnHeroes: Luke

* HarsherInHindsight: The title becomes much harsher when you realize this was the last episode that aired before Creator/ElisabethSladen's death. Sarah Jane appears to be dying from a disease and at the end of the episode, she says she feels like she could keep fighting aliens forever.
** Not only that, but she's replaced by someone who's equally as good as her, [[TheOtherDarrin the fate of most actors who die during filming.]] But since Creator/ElisabethSladen has always played Sarah Jane, the writers could never do that to her.

* RedHerring: A Gareth Roberts episode, with Sarah Jane's name in the title, and a plot where events lead to her considering giving up the alien-hunting business? And the Trickster isn't involved in any way?

* HarsherInHindsight: The title becomes much harsher when you realize this was the last episode that aired before ElisabethSladen's death. Sarah Jane appears to be dying from a disease and at the end of the episode, she says she feels like she could keep fighting aliens forever.
** Not only that, but she's replaced by someone who's equally as good as her, [[TheOtherDarrin the fate of most actors who die during filming.]] But since ElisabethSladen has always played Sarah Jane, the writers could never do that to her.

They go to the junkyard only to find that the sensor overload device requires the sonic lipstick to activate. Sarah Jane had meant to give Clyde the sonic, but accidentally gave him the uncharged blaster instead. Three Dark Horde soldiers advance on them and Sarah Jane realizes that she had gotten them all killed. At the last moment, Ruby appears and throws two similar overload devices to Clyde and Rani. They show the Dark Horde soldiers an illusion of stronger versions of themselves. Frightened, the soldiers return to their ships and the fleet retreats. Ruby apologizes for her attitude at their last meeting and introduces them to her handheld AI, which Rani dubs "Mr. White."

Later, as Sarah Jane returns home from the store, she stops to talk to Gita and says that she needs to make tea for Luke. However, Luke had not returned from university. Concerned about Sarah Jane's memory lapses, Rani and Clyde follow her into her attic. Rani suggests that Sarah Jane take a vacation, but she refuses out of fear that aliens would invade while she was away. Mr. Smith then detects a fleet of Dark Horde battleships headed for Earth. Detecting the alien technology in Sarah Jane's attic, the Dark Horde teleports a team there but Mr. Smith manages to deflect them into a nearby junkyard. Sarah Jane gives Rani a round device meant to overload their sensors and, to the shock of her companions, gives Clyde a blaster.

Ruby becomes fast friends with Rani and Clyde, even teaching Rani how to drive her sports car, making Sarah Jane feel left out. Sarah Jane invites Ruby into the attic and offers her the house and everything in it. Ruby accepts and Sarah Jane gives her command of Mr. Smith, removing her voice from his files. Now firmly in control, Ruby teleports Sarah Jane into a cellar, which contains a giant red organ that Ruby calls her stomach. Ruby explains that she is a Katesh, a creature that feeds off thrills and emotions. She targeted Sarah Jane because of her exciting life, which she found highly appetizing. Ruby reveals that she set up the diseased meteor and the Dark Horde attack, which were just Mr. White's elaborate holograms. Ruby then draws out Sarah Jane's life and begins feeding it directly into her stomach.

Ruby finds out that Clyde is suspicious of her and teleports him into a small spherical room in orbit around the Earth. She explains that the sphere was originally a prison cell. The Katesh exiled her for being unable to control her hunger, leaving her only a video game system. She reprogrammed the game system into the AI Mr. White, turning her prison into a ship. She returns to Earth, leaving Clyde on the ship, which will soon run out of air. Clyde leaves one last message on his phone for his friends.

Having gotten Clyde's message, Luke goes to Rani's house and demands to know what is happening. K9, still in Luke's dorm room, tracks Clyde into space. K9 says that he can reset Mr. White, turning him back into a game system, freeing Mr. Smith and rescuing Clyde. However, he requires a cell phone near Mr. White for it to work. Rani takes her phone into the attic, where she casually sets it down near Mr. White and pretends to have a friendly chat with Ruby. After a few minutes, K9 manages to reset Mr. White, which returns Clyde to Earth and frees Mr. Smith from Ruby's control. Mr. Smith traps Ruby in a containment field and tracks Sarah Jane to Ruby's cellar. Clyde and Rani go to the cellar to rescue Sarah Jane. Ruby breaks out of the containment field and corners them, threatening to digest them directly into her stomach. Luke stops her and gives her a chance to surrender. When she refuses, Luke uses Mr. White's holograms to show meteors falling all over the Earth. The inrush of emotion overloads Ruby and causes her stomach to collapse. Sarah Jane sends her back to her prison cell, which she then sends into the sun.

* WeWillMeetAgain: Ruby vows revenge as her ship heads towards the sun.

The gang returns to Bannerman Road, where Sarah Jane forgets to put on her car's handbrake, causing it to roll before Clyde stops it. They later find that she has moved into a house on Bannerman Road. Suspicious, Sarah Jane & Co. confront her and find out that her name is Ruby White. Sarah Jane tries to make peace with her but Ruby brushes her off.