The Flash Season 6 Review: 8 Ups & 2 Downs From 'Crisis On Infinite Earths, Part 3'
Downs...
2. Too Much Expositional Dialogue
The problem with splitting such a major crossover up over multiple shows is the fact that much of each episode has to be spent recounting what each character was doing leading up to that episode and how they ultimately got to where they're at. But instead of just inserting a 'Previously on...' prologue, the writers decided to exposit that information through dialogue.
Though it's a common trope of network television to throw in expository information into each episode, it's particularly understandable in this case to ensure that viewers of each respective show know what's happening with characters from the others. Unfortunately, when the beginning of each episode in a five-part crossover is spent on one of these thinking-out-loud scenes, it becomes increasingly clear what is happening simply because it keeps happening.
Thus, just like its predecessor, 'Crisis On Infinite Earths, Part Three' fell victim to this and, as a result, some of the dialogue - particularly in the first half - was full of exposition as you could metaphorically see the writers' hands, as they guided us back through everything that happened. And, as viewers, you have to ask if these heroes who found themselves in this life-or-death situation would really stop the bus so many times short of breaking the fourth wall just to say what they already know out loud one more time.