While death is part of the job in the LAPD-focused procedural The Rookie, Captain Zoe Andersen’s (Mercedes Mason) passing was particularly shocking. The Rookie is now going into its seventh season, and for over 100 episodes, it has chronicled the career trajectory of John Nolan (Nathan Fillion), who began the series as the LAPD’s oldest rookie, graduating from the Police Academy in his 40s. He eventually worked his way up to training new crops of officers, but back in season 1, very few people had faith in the older rookie.

https://screenrant.com/captain-andersen-rookie-death-explained/