"Bosch" is an American police procedural television series produced by Amazon Studios. It stars Titus Welliver as Los Angeles Police detective Harry Bosch. The show, developed for Amazon by Eric Overmyer, takes its inspiration from three of Michael Connelly’s novels: "City of Bones", "Echo Park", and "The Concrete Blonde".
Can we infer the following?
Titus Welliver will always play Harry Bosch. 
It's impossible to say