Wentworth was one of the biggest surprise successes on television this year but, according to Perth actress Kate Atkinson, season two will bring even more shocks.
"The worst thing this show could do is rest on its laurels and go 'Look at the massive audience we've got'," she told AAA on the show's custom-built set in Melbourne's Clayton South.
"Coming back for a second season, you cannot underestimate the effect that knowing people are actually watching it has on the way we are operating this time."
After first hitting screens in May this year, Wentworth became the most-watched Australian drama series premiere in Foxtel history.
"The first season was massively successful beyond my expectation," Atkinson said.
The reimagining of cult soap Prisoner has now been sold all over the world and is a big hit in the UK.
Atkinson plays Vera Bennet, one of the prison wardens. The final few episodes revealed some shocks for Vera, including her arrangement with Jacs and the revelation that Fletch and Meg were having an affair before she was murdered.
And in season two - which is set to air next year - Vera's life will be turned upside down by the arrival of new governor Joan "The Freak" Ferguson (acclaimed actress Pamela Rabe).
"She's like a puppet-master, she's playing everyone," Atkinson said.
"Vera needs her, she's pretty much got no one else. The governor is such a canny operator that almost from the get go she pinpoints what Vera's weaknesses are and she knows how to exploit them."
Filming for season two began last month and will continue through to February.
The 12-episode second season will pick up three months after Bea Smith (Danielle Cormack) killed Jacs Holt. While Bea has been languishing in the slot, Franky Doyle (Nicole da Silva) has risen to the position of top dog unopposed.
While filming has only just begun, Atkinson - who has appeared in SeaChange, Offspring, Kath and Kim and the Toni Collette film Japanese Story - will make time to make her way back to Perth before the end of the year.
"I am rock solid on Christmas, my mother would kill me if I didn't," she said.
"I might make another trip, there are lots of weddings. Next year I am back at least twice for a wedding and a significant birthday for my mum."I still have a lot of friends in Perth so I do get up to the Hills and go riding and swimming at the beach."