The rookie 

The Rookie is an ABC police procedural drama starring Nathan Fillion as John Nolan, the oldest rookie in the LAPD, who joins the force in his 40s after a life-altering event. The series follows Nolan and his fellow rookies as they navigate the challenges of police work, blending action, humor, and drama, and is inspired by a true story. It has run for multiple seasons, with a spin-off, The Rookie: Feds, which was canceled after one season