We first see Owen and Cristina positively euphoric in bed together, but they’re the only ones. When the estranged couple (Jackson and April) and could-be couple (Alex and Jo) cross paths, it’s not the happy endings we were hoping for. In fact, we see Alex physically banging down a door, telling Jo to “stop sucking face and check on your patients,” and April sobbing on Jackson’s shoulder — likely because her boyfriend, Matthew, was injured during a huge highway explosion.
Additionally, as we saw in the American promo, guest star Sarah Chalke — whose son is suffering from a mysterious illness — won’t back down until someone fixes her little boy, so between that and the explosion, everyone has to follow Owen’s lead. In his words? “Buckle up, this is going to be a long day.”
If that’s not enough to satisfy you, here's a fullsynopsis of the episode:
"A gas tanker explodes on a Seattle highway, causing multiple injuries — including paramedic Matthew; Meredith and Jo help a frantic mother (Sarah Chalke) whose child is suffering from a mysterious illness; and Owen bonds with a young boy whose parents are in critical condition. Meanwhile true colors are revealed when Alex is forced to work with Jo's boyfriend on an ailing patient."