ABC will bring its summer series Mistresses back for a second season next summer. The soapy drama, based on the British series, had a quiet freshman run, capped by 3.9 million total viewers and a 1.1 18-49 rating for the recent season finale. ABC owns the series, created by K.J. Steinberg and starring Yunjin Kim, Rochelle Aytes, Jes Macallan and Alyssa Milano.