Screenterrier has already reported on the casting of Angus Harrison as Hadley, Matt Morgan as Isaac, Alice Henley as Annabelle, and Dominique Moore as Aretha.
The full line-up has now been announced.
Newcomer Naomi Battrick will play 15 year old Toyah.
"This is my first big television part," reveals Naomi Battrick, 18.Naomi had to totally transform herself by dyeing her blonde hair red for the part.
"When I got the part I went for a costume and wardrobe test and they told me they had a couple of ideas to dye my hair. They put an auburn wig on me and I quite liked it so we went for it," reveals Naomi.
"I thought it looked good and it was quite nice to know that if I ever did want to dye my hair when I'm older, it won't look like I'm wearing a wig. I got used to it after a month and everyone started saying to me, 'Gosh, I couldn't imagine you blonde!'"
"I hadn't done any acting before, this was my very first time," reveals Rachel, who loves English and science at school. "I'd always wanted to act."
So how did Rachel get the part of Martha, who is deaf?
"My sign language teacher told me about it, so I sent off a DVD audition – and they chose me," explains Rachel. "Then I went and did an audition, which was quite scary, and they chose me again!"
So what's Martha like?
"Martha is the one who sorts out all the problems," giggles Rachel.
"She's funny and sometimes bosses the others around. I would like to be like her as she's fantastic! I got to wear very nice clothes as Martha – if there's a party she has to wear something pink and purple. I got to keep some of the clothes too!"
Martha is deaf and Rachel has been able to sign for years as both her parents are deaf, and she attends a school which has a unit for a number of deaf children who are integrated into the school.
"I learnt to do sign language when I was very little. It was quite hard at first, but then it got easier," she reveals. "In the end me and the signing teacher had to teach all of the cast how to sign."