(Spoilers)
Zeppelins are mentioned in Mark's story line, which could hint @ Hiro's, & in Gabriel's a character mentions "The Empire Incident" hinting @ Mark's story line. I TRULY hope all 4 timelines reconverge at some point!!!
THAT WOULD BE SO COOL actually
really really hope that actually does happen, im gonna explode. I'm curious on how they'll connect Ken into his former life though?