9-1-1 will not be airing any episodes on ABC on Thursday 4/9.

I know that more often than not, hiatuses for the show are peppered with repeat airings from the past season thusfar. However, this Thursday, April 9th, all three hours of Primetime 8 to 10 PM will be filled with the first three episodes of R.J. Decker to be re-aired. 9-1-1: Nashville and Grey's Anatomy will also not air in their regular timeslots due to this schedule.