Back to Wednesday (1 day earlier). Simon visits Sia at St Phils where she's being treated for burns. Sia is convinced Lewis started the fire in her office, but the police don't believe her. At the Mill Simon voices his suspicions, but everyone else is too preoccupied with the ball, and Simon is sent to cover at the Campus – excluded again.
PC Brian Miles questions Lewis about the fire, and Jack is furious to discover Sia is pointing the finger at Lewis, sighting his creative writing. At the Cutler house, Gerry is struggling to get Ned to do his coursework as Ned would rather play 'Trigger King' on the computer. The two argue about Lewis.
Rob drops Immie at college with her artwork, still thinking the reason she's on edge around Lewis is because she fancies him. On the way into college Ned reveals to Immie that he hasn't started his artwork – he can't see the point. Inspector Suresh reveals Sia is not a reliable witness as she made unfounded accusations when she accused a previous colleague of stalking her.
At uni, Jack informs Sia that her students will be handing in blank pages instead of work; if she can accuse Lewis of starting the fire because of his writing, why should they put themselves in that situation. The students have gone to the head of faculty, and are boycotting her classes.
Gerry and Ned argue – Ned's teachers have called home about his lack of coursework – a frustrated Gerry says Ned needs to get his act together, or he's out. Having seen the way Gerry dealt with Lewis, it's what Ned has been waiting for. Ned goes to see Lewis, but his older brother shuns him, so Ned wanders round campus swigging vodka.
At the campus surgery patients are queuing as Simon goes to see Ellie to convince her to tell the police about Lewis threatening her with a knife. Ellie goes to see the head of faculty but only to ask for a new personal tutor, rather than Sia.
When Simon gets back to the Campus, Zara has taken over his patients, and tells him Heston wants to see him back at the Mill. Heston thinks Simon is getting unreasonably obsessed with Sia's plight, and reveals she left her last post after making unfounded allegations. Simon may be trying to help, but his sympathy could be making things worse.
On campus, Sia finds Ned drunkenly passed out, and helps to sober him up. Ned reveals he has avoided doing his coursework to force his father to throw him out – just like he did with his brother Lewis. With this new information Sia goes to see Lewis at his halls, to try to reach an understanding. Lewis reveals he did set fire to her office, and shows disdain for the police, his fellow students, and her. He even taunts Sia, showing her a video of him ranting to camera holding his father's army gun.
When Rob voices concern regarding Sia's new information, Inspector Suresh tells him they can't go round making inquiries into every teenager who makes silly videos.
Ellie tries to warn Jack about Lewis – but Jack isn't interested – she's just a liar and a thief. Meanwhile Karen welcomes Lewis to stay for supper with the Hollins, and to stay over if he likes.
At the police station, Simon confronts Rob about Lewis, but Rob tows the official line – they've no evidence to question him. But at the Hollins' house Karen has just found the gouge Lewis made with her kitchen knife in the table – and she begins to get suspicious.