Rebecca Riggs is an Australian actress with a strong theatre background who has appeared in TV shows such as Blue Heelers and Day of the Roses. She's also had parts in such movies as Jerry Maguire and Raw Nerve.

She's not entirely new to science fiction, having played Ms Vansen in the pilot episode of Space: Above and Beyond. A big fan of the genre, her portrayal of Grayza draws a lot from her enthusiasm for British sci-fi series Blakes' Seven. Now, who'd have guessed that.

Read our character profile of Grayza.