I love this series but I do have a small problem with the temporal mechanics. I know the real reason why they visit random points in history each week - for the same reason the did so in
Time Tunnel and
Quantum Leap - it makes better TV. However, those two series had valid reasons for their randomness. Here, they are trying to prevent some nefarious Ritterhouse plot spread across the whole of history. Last season there were only a small number of changes to put right, but now the changes are more widespread. My problem is that in reality, neither group would never be messing around in 1955, as it is far too close to the present day. The further back in time you go, the bigger and more far-reaching the consequences will be of any change you make. If Rittenhouse change anything in a more recent year, our heroes can go back to the day before and reverse it. Rittenhouse can then go back to the day before that. This could continue, with each iteration going progressively back in time, until a race back to the beginning would ensue. The beginning, I guess, being the formation of Rittenhouse (although it is possible they could continue back to the dinosaurs or blue-green algae.) That beginning is where the final battle will be fought, so anything else they do is pointless.
On the other hand, maybe the creation of the time machine is another "beginning" that can be wiped. However, thinking about having two "beginnings" makes my head hurt.
I also don't know where Jiya's ability to see the future/alternative future/past fits into this, but it must become important. That is one ability Rittenhouse do not have, which must make it an advantage. I'm not sure either why she is keeping it secret. She may have thought she was going mad, but with Rufus' burn to the arm, she now knows it is something real.
Are we still going with Rittenhouse is evil?? Because Lucy was not so nice and Agent Christopher locking up the Time Team in a bunker? Not so nice either.
Yes, even last season there were signs that everything wasn't black and white. I suspect that Flynn will become a full team member once everyone can accept that, because he has never been wrong, and the his own cause is perfectly aligned with them.
Is Rittenhouse evil? - they do kill without any regret. We still don't really know what they aspire to do. Their cause could be just. Maybe they are trying to prevent the destruction of Earth in the future - would a just cause give them a moral backing their actions and impunity? If they are just trying to create a "perfect" idealised Earth, then that would not be a just cause.