Cross-Over Continuity Confusion Clean-Up

I had begun following the DC Universe again but was not all-in; it's been too much of a commitment to watch a half-dozen shows on the CW Network.

Last week I tried to catch up by taking in three hours of Crisis On Infinite Earths, the highly touted cross-over event based on DC's comic series from the mid-1980's. In the 1980's Crisis cleaned up the many inconsistencies in the DC multiverse and permitted nearly every character to reboot his or her origin tales.

On television the DC heroes' stories differ significantly from the comics, and occasional viewers-cum-comics readers are easily confused. Like the print version, the TV Crisis (so far) has destroyed many worlds and heroes. Good, there's a lot of history I no longer have to learn.

Going forward, six shows a week is still too much of a time sink.

I do intend to tune in to the cross-over episodes, especially when the casts find an excuse to showcase their song-and-dance talents. (Many of the actors in DC shows have musical training.)

Below is a number from a 2017 episode of The Flash, in which Supergirl (Melissa Benoist) and Flash (Grant Gustin) find themselves trapped in a dream world: