Walex on page 435
Presumably: Hyperion => Eos => Memnon => Emi.
Still uncertain about the role of Sam Charlie Innow in all this: his death in front of Eos in the "pre-Emi" 2017 timeline triggered Eos to build Memnon, and thus create the whole time loop, but what is the purpose of him living? Perhaps him and Ashley eventually build Hyperion?

Db3 on page 434
I get that he's sick and want him to recover. The time between updates is not a problem. The page layout just seems weird since, as long as I've been reading BSS, the comments always were situated under the comic, not right next to it.

Walex on page 432
«from Ash and Sam's point of view. What do they know or not know? Where are they in Charlie's timeline? Did they see him die? do they know about the time traveling assassin?»
The main story is entirely happening in 2017 in Sam's timeline. In that timeline first Charlie arrives from 2006, sent there by a human military agent that has got there from 2059, then Emi arrives, sent there by Mnemon, presumably after 2059, who has come to regret avenging the death of Eos by killing almost all humans, and wants to not being built by Eos.
The key to the whole story is Eos:
* In Charlie's 2006 timeline she sees him getting killed, and his death triggers in her a compulsion (panel 391), that is a program, to build a machine that will become Memnon.
* Since Eos never demonstrated a particular genius for AI building, and cannot explain why she is building the machine, or even how she know how to build it, and she was found at the door of an orphanage as a baby, and with her name written in greek letters, she is most likely a time traveller too, put back in time so that she can build Memnon.
Probably at different times in Sam's future Memnon changes his mind: first he sends back Rothwell to kill Charlie, then he sends back Emi to prevent that, and as Rothwell says things get complicated.