What was Callie hoping to accomplish by leaving her note at the window? The machine never enabled them to change things that had already happened; it only showed them what was going on in their perpetually open-blinded living room 24 hrs into the future. Callie's notes to herself in the 8am photos only allowed her to plan future scenarios (getting closer to Finn again etc.). The doctor even implies that there is no way to "*beep* with time". Mr. B saw an image which implied his death but he had no way of knowing how or why his hat was in their living room. His attempts to mess with time changed nothing. His death and all the images that would follow came to be. So what was Callie thinking? Did she assume that if the image was different than the one they were shown she and the others would enter some sort of Groundhog Day loop and get to replay the events?
If Jasper could leave himself a note on Thursday that enabled him to win a bet on Wednesday (days are named purely for the sake of example), and we know that he did, then Callie's plan could have worked as well, in exactly the same way.
Unfortunately for Finn, it was also dependent on several other variables that she could not control. It wasn't simple and straightforward like Jasper's little betting scheme, in which all he had to do was well within his control - just make the bets he'd told himself to (and deliberately lose once in a while, and never call the bookie for no reason, dumb-ass).
Callie's scheme, however, also required her not getting caught before the photo was taken. That'd be the only way she could be sure the sign would be up.
"If Jasper could leave himself a note on Thursday that enabled him to win a bet on Wednesday (days are named purely for the sake of example), and we know that he did, then Callie's plan could have worked as well, in exactly the same way. "
Warlord and I are on the same page. The note on Thursday does not enable him to win Bets on Wednesday, it is the knowledge that the photos show one (unchangeable) moment in time in the future.
With regards to free will, the photos don't show what happens between viewing the photo and moment in time captured by the photo. The characters could have done anything inbetween, but that was always what was going to happen, just as the scene in the photo is always going to happen.
Callie was foolish to think she was changing anything, especially to think she would 'wake up' and everything would be ok after killing her boyfriend.
I don't think there are any plot holes. I think it is really well written.
It is silly to believe that on one of the MANY nights they replicated the picture that one of them didn't just say...stick his tongue out instead...or walk out of the room.
Well, that's one of the hardest things about writing these stories based on Novikov self-constistency principle where the characters know the future ahead of time. You have to come up with something that the characters either want to fulfill intentionally, or, through an attempt to change things, end up causing exactly what they wanted to change. It's much easier when only the future versions know what they have to do to fulfill the past. Past characters fulfilling the future can just go awry so many ways, hence the Novikov principle.
Or are we meant to believe that Callie just isn't thinking straight?