Christine Baranski Diane Lockhart Actor Cush Jumbo Lucca Quinn Actor Rose Leslie Maia Rindell Actor Delroy Lindo Adrian Boseman Actor Audra McDonald Liz Reddick-Lawrence Actor Sarah Steele Marissa Gold Actor Justin Bartha Colin Morrello Actor Michael Boatman Julius Cain Actor Nyambi Nyambi Jay Dipersia Actor Carrie Preston Guest Star Gary Cole Guest Star Tim Matheson Guest Star Mamie Gummer Guest Star Christian Borle Guest Star Robert King Executive Producer Michelle King Executive Producer Ridley Scott Executive Producer David W. Zucker Executive Producer Liz Glotzer Executive Producer Brooke Kennedy Executive Producer