Catherine Tregenna has only ever worked in romance.
Casualty , stylised as CASUAL+Y , is a British medical drama series that airs weekly on BBC One ( sometimes with a short break in the summer between series , but not always ) . Catherine Tregenna . She has also written episodes for EastEnders , Casualty , and for the first four series of ITV1 crime drama Law & Order : UK , which began transmitting in February 2009 . `` Meat '' is the fourth episode of the second series of British science fiction television series Torchwood , which was first broadcast by BBC Two on 6 February 2008 .