Here's how the network is describing Episode 2, "A Flash of the Lightning" which (nerd alert!) shares its name with the eighth issue of the Crisis on Infinite Earths miniseries:
https://www.youtube.com/watch?v=BVpB6n6CdbwVideo can't be loaded because JavaScript is disabled: The Flash 6×02 Promo "A Flash of Lightning" (HD) Season 6 Episode 2 Promo (https://www.youtube.com/watch?v=BVpB6n6Cdbw)
"The Flash" season[...]