According to The Hollywood Reporter, cameras have stopped rolling on the sets of several The CW series, including Riverdale, Supergirl, Legends of Tomorrow, Nancy Drew, and Charmed.A studio executive told THR that the bottleneck at local testing facilities is a situation they're monitoring "hour by hour and day by day" as safety of the crews is of the "utmost importance." TV Guide has reached out to The CW for comment and will update this post when that is available.