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.
In British law, a Silk is a high-ranking lawyer or barrister recognized by the court system to work in the name of the monarchy.
Rupert Penry-Jones and Miranda Raison also co-star in Spooks or MI-5.