Before Titus Welliver stepped into Bosch's shoes, another major actor came dangerously close. You can forget Reacher or The Terminal List; it's actually Bosch that's Prime Video's longest-running series. Adapting the Michael Connolly novels of the same name, the original show ran for seven seasons and, incredibly, the franchise only appears to be gaining momentum.
The show has spawned two spinoffs thus far, with Bosch: Legacy - which lasted for three seasons - and the Maggie Q-fronted Ballard. The upcoming Bosch: Start of Watch will be a prequel, where Cameron Monaghan plays a rookie version of the title character during the 1990s. Start of Watch's recasting could also lead to big changes for the franchise, too.
If the prequel is a success, Monaghan could become the new figurehead of the entire franchise; thankfully, it doesn't feel like Welliver is going anywhere just yet. Bosch itself had a long, twisty journey to the big screen. The books were originally optioned by Paramount during the 1990s, with the studio apparently seeing the same type of franchise potential as their Jack Ryan or Alex Cross movies.
John Travolta was who the studio saw as Bosch, with the actor coming off movies like Face/Off around this time. Now, casting Travolta as a maverick, rule-breaking cop sounds obvious, but he ultimately feels like a bad pick.
John Travolta Was Totally Wrong For Bosch
In both the books and the TV series, Detective "Harry" Bosch is an internal, brooding character. He's not all that different from other rule-bending detectives like Dirty Harry, and while not the warmest of characters, he is loyal to friends and has a nice, dry sense of humor. The issue with casting Travolta is his tendency to get real hammy and over the top.
That's a sweeping statement, as he has given some nuanced performances too, but when it came to playing cops or law enforcement figures, Travolta loves to go BIG. Face/Off is the obvious example, but even playing supposedly grounded figures in thrillers like Basic saw him struggle to keep his more theatrical instincts at bay.
The first Michael Connolly movie adaptation was 2002's Blood Work, which both starred and was directed by Clint Eastwood; the original book was also set in the world of Bosch.
That energy is wrong for Bosch, and would have removed a key aspect of his character. A John Travolta Bosch movie would have been about tailoring the role to him, instead of the other way around. Paramount had optioned a couple of Connolly novels to adapt into a movie, with The Black Ice planned as the first.
Directors like Oliver Stone and Paul Verhoeven were considered for the Bosch movie, which eventually went nowhere. It's said that the darkness of the source material soured the studio on a planned adaptation, and Connolly eventually had to sue Paramount to win back the rights to the character.
Titus Welliver Has Played Bosch For 12 Years (And Counting)
Welliver was one of the ultimate "that guy" actors for years, leading up to Bosch. He had appeared in dozens of movies and TV shows, and while most audiences didn't know his name, he could make even one-scene appearances (like his vicious gangster in 2005's Assault on Precinct 13 remake) stand out.
In Bosch, Welliver found his perfect leading man role. Even when standing still and saying nothing, Welliver is captivating, and he gives the title detective so much internal life. Like any live-action adaptation, changes had to be made to the character, but overall, the show is quite faithful to Bosch himself. Obviously, Welliver's performance clicked with viewers, since he's been playing the role for 12 years, as of 2026.
With the end of Bosch and Legacy, his involvement is currently as a guest star on Ballard, but he's still an active part of the series. The star is also busy on other projects (like The Westies), which may account for his reduced workload as Harry. That said, it feels like, so long as the franchise itself is still running, Welliver is only happy to keep playing Bosch.