There was 1 spoiler in the Emerald City Comic Con wrap-up by a fan named 'vengeancebulitmehastily,' that is posted in the main section of this website.
The information supposedly comes directly from John Noble and Jasika Nicole who headlined the event.
•And, finally: SPOILERS FOR EPISODE 3x19:
John and Jasika both said they loved filming 3.19, Jasika going as far as to say it was her favorite ep this season. Apparently, Olivia, Peter, and Walter all become “incapacitated” (John’s word) somehow (there was a lot of laughing between John and Jasika here), so Astrid has to save the day. It’s “as close to an Astrid-centric episode as we’re going to get this season,” according to Jasika. Also, Lance has a big role.