There's one thing I didn't understand with Time Squared. If it's the same time-displaced Picard (and shuttle) that are stuck in the loop, how many cycles did they go through? Just one? We see the log where Riker sees the shuttle off, so I assume it was the first one. Otherwise both that Picard and shuttle would age infinitely until the loop is stopped.
Why was that Picard so intent on making the same decision again? How did the real Picard know to fly through the portal? The setup was great, but the payoff was confusing.