Creed merely alluded to having killed her to boost his sick serial killer ego. Nico Ricci and his son Luca were responsible for the murder of Carnival Club waitress Kara Wolfson (as seen in that horrible Super 8 snuff film), and Dennis Creed had killed several women as well as schoolgirl Louise Tucker, but it was Janice who killed Margot. They had nothing to do with Margot’s disappearance. So, It Wasn’t the Riccis or Dennis Creed? The series ended with her facing trial and her son Kevin willing to testify against her for having poisoned him as a child. Janice kept framed photographs of all her victims on the wall of her flat, including Steve’s two girlfriends, Margot, and many, many more. When Gwilhelm came around, he walked in on Janice killing Margot, so she told him that he’d done it with magic, which he believed and told his learning disabled wife and son, hence that weird rumour. Janice encased Margot’s body in concrete and stashed it inside the Athorns’ ottoman, which is where Robin found it decades later. There, Janice had prepared a sack of concrete and bribed drug addict Gwilhelm Athorn to let her put him and his family to sleep while she killed Margot. Margot left work on the day of her disappearance drugged, struggled with Janice by the phone box (as per the witness report) before collapsing and being dragged by Janice to the nearby Athorns’ flat. Janice sent Margot an anonymous box of poisoned chocolates that Margot was too suspicious to eat, so Janice poisoned a doughnut that receptionist Gloria fetched for the working-late GP. Poisoned Chocolates, the Athorns and the Concrete Janice tracked Steve down to a holiday camp and killed his next girlfriend by drowning her in a swimming pool, which is why Steve changed his name again and fled to Skegness. Margot treated Kevin for what seemed to be his chronic illness, which is what aroused her suspicions.

She also planned to murder little Kevin, whom she made ill by poisoning special “drinks” so that she could be with Steve unencumbered by a child, but stopped when Steve ran away. Janice was obsessed with Steve and murdered his married girlfriend by forcing her to drink bleach and framing her death as a suicide to clear her out of the way. Back in the 1970s, Janice was poisoning her colleague Dr Brenner (hence the ampoule found in his drink), her neighbour Steve Douthwaite (played by Confessions of a Window Cleaner’s Robin Askwith), and her own young son Kevin.

Luca perfume poison