Martha Costello

Martha Costello QC is a fictional Defense Barrister portrayed by Maxine Peake who is a Queen's Counsel. She is 37 years old (in series 1/2) and loves her job as a barrister. She never prosecutes as she feels that she can't prosecute someone who might not be guilty. In the first series she was competing against fellow barrister Clive Reader to get silk.