Casualty which it had postponed in the wake of the Uvalde massacre in Texas, where 19 children and two teachers were killed at Robb Elementary School. The extended episode, titled Wednesday's Child, was originally scheduled to screen last Saturday, June 11.However, as the plot focused on a school shooting, it was delayed by a week and screened tonight (June 18). Viewers have been left shocked by the events in the episode, which the BBC's continuity announcer said was filmed in January.