Maeve Donovan, played by Beth Riesgraf, dies in the Season 9 episode "The 24" which aired in May 2014. In this two-part episode finale, the team finally tracks down Maeve's location after she has been a recurring character since Season 8. Despite Reid's efforts to save her, Maeve is killed by her stalker and obsessed fan. Her death occurs at the climax of the episode and serves as a pivotal, devastating moment for Reid's character, marking a significant turning point in his emotional development throughout the series. This incident becomes a core trauma that affects Reid's storylines in subsequent seasons.