Can the series have a happy ending?
Can the series have a happy ending, without upsetting detail guys, like me, who really paid attention to how the show portrayed time travel in the first three seasons?
Last summer I was feeling grumpy, and betrayed, because the time travel technology used by evil Kellogg, and his minions from the alternate dystopia in an alternate 2037, seemed incompatible and inconsistent with that used by Alec and the freelancers. An interview with show creator Simon Barry seemed to hint at a happy ending, where Kiera was re-united with her son. That made me grumpy too.
I felt pretty sure, during episode 1.1, that Kiera shouldn't be able to return "home" to the 2077 of execution day. Subsequent episodes, particularly the one where a time traveler's grandmother is prematurely murdered, confirmed for me that when time forks, events on the forks are insulated from one another. Alec's time travel technology only seemed to enable travel along the current branch of time. It didnt let the traveler tunnel to alternate branches of time.
In some other works of fiction, members of the time patrol not only enter the spatial destination they are headed to, and the time they are going to, but they also enter other coordinates that let them navigate to all kinds of other branches of time. For this kind of time machine, travel up and down the current branch of time would be a special case.
Brad Tonkin didn't use the time travel technology Kellogg seems to have commissioned, to travel back to 2013. He was sent back via an abandoned freelancer time tram. It looks like Kellogg's time travel technology, unlike Alec's time travel, requires time transceivers at both the sending and receiving times. Brad's primary role seems to have been to carry back the beacon, a time travel receiver large enough to receive just one squad of soldiers.
Kellogg-2037's trusted lieutenant Marcellus convinces Kellogg-2015 to suply resources from Piron to build a mysterious device, to their specifications. It is a larger receiver, large enough to receive a small army.
Well, during my grumpy summer I complained Kellogg couldn't send comrades to help Brad unless they used a different kind of time travel -- one that could tunnel between branches. And Simon Barry has done that. Kellogg's time travel technology only works across branches.
So, I am now ready not to be completely disappointed by a happy ending where Kiera re-unites with adorable young Sam Cameron.
Alec called the Kellogg device something like a "bound wormhole". He told Kiera he thought he could hack it, to send her back to 2077.
Great! But since it needs a receiver, does he use the timesphere in 2077 as the receiver? Can he make it work without a receiver? If he does use the timesphere in 2077 he really can only use it to transmit to the execution chamber, right back to back to it transmitting Kiera and Liber8 to 2012.
But wait, Marcellus said the transmitter and receiver had to be at the exact same physical locations, on their respective branches of time.
If Kiera does arrive back home, in 2077, it should be the same terrible 2077 she left. She didn't know it was terrible then, but she does now.