The Joker (Batman), Maleficent (Sleeping Beauty), Sister Ratched (The Cuckoo's Nest) and Cruella de Vil (Pongo and the 101 Dalmatians) have their own movies and TV series where their background story is to be reviewed - how did they really become so evil?
The cultural news's film critic Fredrik Sahlin believes that the true crime wave of recent years may have spilled over into the fiction.
- I think it has to do with the fascination of our time for criminals.
It's exciting to try to get into the psyche of these evil characters, he says and continues:
- It is a very simple explanatory model: if you behave like this towards a human being, then he becomes like this.
It is an almost mathematical psychological development that is very easy to write.
- But basically it is about the film and TV companies wanting to raise money to create spin-offs on already well-known brands.
See more in the clip.