Whereas with BATMAN, LOST IN SPACE and VOYAGE, and now UNCLE, I'm watching an entire series all the way thru before then going back to watch it all a 2nd time, with THE FLASH, perhaps because the 1st season was a gift, I watched the 1st season all the way thru, then watched it again... then, I got the 2nd season, watched it all the way thru... and today, I'm starting on season 2 AGAIN.
Since so far, each season has been like ONE long mystery story, going back to the beginning of the season is like re-reading a complex mystery a 2nd time, only now, I know so much I didn't before, so it becomes a very different experience.
One example is how, in the deleted scene in the 1st episode, Barry's father Henry tells him he did the right thing by NOT saving his mother's life via time-travel, and messing with destiny or whatever. How ironic, that in the very LAST scene in the 2nd season finale, that is EXACTLY what Barry tires to do... AGAIN.
But watching the series this way, I now have to wait 24 WEEKS to see how that turns out.
I'm reminded of a comics story (I think John Byrne may have written it) that suggested that if you go back in time and change history, you DON'T change your own history... you only create a divergent ALTERNATE timeline, separate from your own. I have a sneaking suspicion that's going to happen when I get to season 3.