Kelly Macdonald

"I found it quite traumatising; there was a weird sort of stress involved."
Kelly stayed true to her character as she faced a grilling from Dan Walker.
If your head hurts from trying to work out who everyone is and what else you've seen them in, we're here to help.
Kelly is playing the enigmatic DCI Joanne Davidson in the sixth series of Jed Mercurio's hit BBC drama.