Guest Stars Tallulah Fox as Sarah Beatty Fifi Fox as Sarah Beatty Sanjeev Bhaskar as Kanan Dutta Lesley Vickerage as Katherine Dutta Neil Stuke as Professor Andrew Crane Beatie Edney as Justine Skinner Emily Joyce as Jane Grace Tuppence Middleton as Vicki Walmsley Catherine Steadman as Polly Beatty Adam Wadsworth as Joshua Grace Dominic Mafham as Frank McLean Marty Cruikshank as Woman Interviewee Edwin Thomas as Reuben Beatty Suzette Llewellyn as Susan Smith Carol Harvey as Mandy Uncredited Kirsten Foster as WTC Stapleton Hermione Gulliford as Lucy Sopher