The Rookie brought back Liam Glasser (Seth Gable) in Season 7, Episode 15, "A Deadly Secret," as documentarians revisited Westview, the condemned hospital where he had sharpened his serial killer teeth. It was revealed that someone had been deliberately using some illegal drugs for unsanctioned experiments, which affected some people. One of Abigail's (Madeleine Coghlan) final interviews included Glasser, who made a strong impression that he would appeal his case, citing the drugs as his defense. The development felt like a classic move by The Rookie, where it saves its villains for the future, and when asked about it, showrunner Alexi Hawley told TV Insider Glasser could return down the line. However, "Not this season," he said. "I think potentially going into Season 8. I mean, he’s such a great actor and such a great character, and we have not really ever taken anything to trial before on our show because we’re really a patrol show," he continued, adding: