9-1-1‘s April 17 episode, the heartbreaking final episode for Peter Krause‘s Bobby Nash, hit ratings highs for ABC and Hulu.
After seven days of cross-platform viewing, the show’s April 17 “Lab Rats” episode, delivered 8.45 million viewers and a 1.74 rating among adults 18-49, based on Nielsen and internal streaming data. The demo rating marks a five-month high for 9-1-1, its best since the Nov. 7, 2024, episode.
On linear, the show drew 5.64 million Total Viewers and a 0.56 rating in Adults 18-49, a double-digit rise over the show’s initial Live+Same Day audience in Total Viewers (+48%; vs. 3.81 million) and Adults 18-49 (+56%; vs. 0.36 rating).
“Lab Rats” is Part 2 of the two-episode lab leak arc, in which Bobby, Chimney, Hen and Ravi got locked in an underground lab that had been experimenting with a deadly virus after they went in to put out a fire. Bobby went on to save the lives of each of his team members, performing life-saving surgery on Hen when her lung collapsed; delivering oxygen to Ravi when he fainted after his tank went empty; and helping treat Chimney, who had become infected with the virus, slowing the disease’s progression while sending Athena to track down the stolen vial of anti-viral.
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The vial was successfully retrieved and Chimney was saved, only for Bobby to reveal after his team had been rescued that his air tube had been compromised and he also had become infected, selflessly hiding his illness so the only dose of the antidote could go to expectant father Chimney. Bobby died so others on his crew would survive.
In his goodbye letter to fans, Krause wrote that “Bobby Nash was written in sacrifice and he was built for this. First responders risk their lives on the job so that others can see another day. His story arc honors them.”
On Thursday’s May 1 9-1-1 epsiode, the 118 must come together to lay their fallen hero to rest. Meanwhile, despite her own grief, Athena re-investigates the death of a child to help a grieving mother.