Discussing the letters she receives from fans, Brealey told EW: “One of the interesting things is that they come from all over the world, literally. A lot of young Chinese women really, really love Molly. The Philippines. Russia. There’s lots [of fans] all over Europe. America, obviously. Canada. Everywhere. They just really like her. She’s unthreatening.”

She explained: “I always [compare it to] Dirty Dancing. She’s sort of Baby wanting Johnny Castle to change her world. She embodies that. And then I’m really mouthy on Twitter talking about feminism and stuff. They seem to rather enjoy the contrast.”

> Find out everything we know so far about Series 4 in our news summary.

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> Buy Series 3 on DVD on Amazon.

> Buy the Series 1-2 boxset on Amazon.

Watch the Series 3 teaser trailer…