Effy from skins dating
Josh's idea of revenge is sick, twisted, and dark like nothing else in the series up to this point, and is handled excellently by the writers, who succeed in making it feel dark and actually sort of spooky and disturbing.
There's some hilarious sections in this episode, but as a whole it's as dark as "Skins" gets in series one (series two would feature several more episodes where things got really dark and miserable).
She appears briefly in "Jal"; when Tony and Michelle delay Michelle's shopping trip with Jal (as they are obviously going upstairs to have sex) Effy smirks, not taking her eyes off the TV.
In "Effy", Tony is forced to care about someone other than himself for once when Effy -- one of the only people he cares about - disappears.
Hats off to director Adam Smith who builds a spooky and foreboding atmosphere without which this episode might have fallen flat on its face, and kudos to Kaya Scodelario, the youngest of the frequently seen Skins actors, but also perhaps the most talented and promising.
By the third season, she is considered to be the queen bee at Roundview, having shed her mute state and continuing to be best friends with Pandora Moon.
Sid arrives to help, and he and Tony take Effy to hospital where they and her parents are told she has taken clean pharmaceuticals and will be fine.
In the series finale, we learn her parents have moved her to the private school which Josh and Abigail Stock attend in the aftermath of her drug episode.
Although less manipulative than Tony, she skirts into the darker side of her personality more frequently.
She also rarely speaks in the first series, marking the episode, "Effy" the first she speaks, where she describes how she feels towards others, in which she laments. Tony sarcastically comments that she is participating in a sponsored silence.