Kim Fox will learn a secret that brings her face-to-face with Darnell, the half-brother Denise never knew she had. Kim Fox Uncovers Denise Fox’s Secret Half-Brother Darnell. The BBC soap expands the Fox-Trueman family as Denie Fox is fighting against blood cancer and her urgent search for a stem cell donor. Now, Kim will learn that Denise has a secret half-brother Darnell played by Christopher Colquhoun. EastEnders Cast And Executive Producer Welcome The New Family MembersKrysstina also shared her excitement about joining the show.