Bosch Prequel Start Of Watch Begins To Build Its Cast

Back To Bosch’s Beginning

MGM+ announced a prequel series to Bosch, Start Of Watch, last October and they’re beginning to announce its cast. Here’s a few details courtesy of our friends at Variety…

Bosch: Start of Watch is starting to fill out its main cast, with Ariana Guerra joining the series.

The Bosch prequel, which was picked up to series at MGM+ in October 2025, will star Cameron Monaghan as a young Harry Bosch in his rookie days in the LAPD, while Omari Hardwick will play veteran officer Eli Bridges.

Bosch: Start of Watch will take place in 1991 Los Angeles. The official logline states, “The series will explore a city on the edge, teeming with racial tension, gang violence, and a fractured LAPD. Amid routine calls and growing unrest, Bosch finds himself drawn into a high-profile heist and a web of criminal corruption that will test his loyalty to the badge and shape his future as the detective who lives by the code, ‘Everybody counts or nobody counts.’”

Guerra will star as Rosa, who is described as “a rookie LAPD officer and native Angeleno who brings uncommon maturity and street smarts to the job. Raised in the neighborhoods she patrols, she represents a new generation of cops in a post-Rodney King city. Beneath her confidence is a deep insecurity – shaped by a young pregnancy, a failed first career, and the pressure of providing for her child. During her probationary year, a budding romance with Bosch threatens her credibility, forcing Rosa to prove she can finish what she starts.”

Bosch: Start of Watch is based on Michael Connelly’s Det. Harry Bosch books, which spawned the original series. Production will begin in Los Angeles later this year.

Tom Bernardo (“Bosch,” “Bosch: Legacy”) and Brian Anthony (“Bosch: Legacy,” “FBI”) are the co-creators and executive producers on the series, with Bernardo also serving as showrunner. Connelly, Henrik Bastin, Jamie Boscardin Martin, and Jasmine Russ also serve as executive producers. Theresa Snider serves as co-executive producer for Hieronymus Pictures. Seth Yanklewitz is in charge of casting. Fabel Entertainment produces.

Read the whole story here

https://variety.com/2026/tv/news/bosch-prequel-start-of-watch-cast-ariana-guerra-1236659478