The article contains major SPOILERS for 9-1-1 season 6, episode 10What will happen next to Buck in 9-1-1 after that big cliffhanger is discussed by star Oliver Stark. Returning for its first episode since November, 9-1-1 season 6 episode 10, titled "In a Flash," concludes with Evan “Buck” Buckley (Stark) getting struck by lightning during a call. As the hour drew to a close, Buck's friends and co-workers rushed to get him the help he needs in order to save his life. Buck is put in an ambulance, and attempts are made to restore the firefighter's heartbeat.
https://screenrant.com/911-season-6-episode-10-cliffhanger-buck-future/