Doc adds Blair Underwood as Huffman exits; Katie heads to college

Deadline reports Felicity Huffman exits Doc as a series regular after Season 2, with Blair Underwood joining in Season 3 as trauma surgeon Dr. Ben Grant; Charlotte Fountain-Jardim’s Katie leaves the regular cast to attend Northwestern and will guest-star, while Scott Wolf’s Dr. Richard Miller may be brought back in some capacity. The shift signals an empty-nest arc for Amy and Michael as the show moves forward with new cast dynamics.