Cassie does her best to keep up, but Cole is calling to tell her that he’s already participating in Operation Troy, and he’s going to need to learn all the details about it – exactly one week from now.
Wexler is faced with the choice of killing Cole and saving himself, or sparing Cole and possibly saving himself. It doesn’t go great at all. But at least MOST of the people with the virus are killed in the process.
Cole was successful, but he also died in the process, but now, a week later, Cassie realizes that she is sending him to his doom. Telling him means that the mission could go awry. Not telling means he’s dead.
So it's one week later. Cole - who hasn't yet gone to stop Operation: Troy because time travel is trippy and that's how it works - shows up at Cassie's. Aaron Marker gives Cole all he needs to know about Operation Troy. The more Aaron Marker does, the more he seems like a stand-up guy and not a jealous ex.