Bosch: Legacy season 3 will introduce the character of Renee Ballard, played by Maggie Q, before she takes the lead in her own spin-off series on Prime Video. Ballard is a legendary character in Michael Connelly's book series, who often appears alongside Harry Bosch to investigate cold cases. Even though the character is fictional, Connelly did base Renee Ballard on a real life LAPD detective called Mitzi Roberts.