After Maxine Peake landed the role of Barrister Martha Costello, she went to Manchester Crown Court (UK) as a casual observer to gain some insight into general courtroom procedures and activities.

Rupert Penry-Jones claimed to dislike the lawyer robes and wig, claiming "You look a bit of a knob in the gown".

Rupert Penry-Jones, Phil Davis, and Alex Jennings also co-star together on Whitechapel.

Rupert Penry-Jones and Miranda Raison also co-star in Spooks or MI-5.

Director and creator Peter Moffat claims that one of the reasons for Martha's miscarriage in Series 1 was that he wanted to avoid the 'hackneyed' stereotype of a successful woman "struggling between motherhood and career".