The season continued to follow Carrie Wells, a detective with hyperthymesia (perfect recall), as she and her partner Al Burns solved complex crimes.
: Poppy Montgomery (Carrie Wells), Dylan Walsh (Al Burns), and James Hiroyuki Liao (Jay Lee) were the only core regulars to return. New Regulars :
The fourth season of marked a major turning point for the series, characterized by a move to a new network and a significant cast overhaul . Originally a CBS procedural, the show was picked up by A&E for its final 13-episode run after being canceled by its original network twice. Production and Network Transition
Despite its "death-defying" history, the series was officially canceled for the third and final time on February 16, 2016, shortly after the Season 4 finale aired. A&E opted not to order a fifth season, and unlike previous cancellations, no further efforts were made to find a new home for the show.
: Jane Curtin, Tawny Cypress, and Dallas Roberts left the main cast, though Roberts made guest appearances. Skeet Ulrich joined as Carrie’s mysterious husband, Eddie Martin, a role originally played by Michael Dempsey. Season 4 Plot Highlights
: Plots ranged from investigating high-stakes video game corporate espionage to a cold case involving con artists and a secret aerospace engineering mission.