Season 14 will see the Sarah Utterback reprise her role as Olivia, who started on the show in season 1 when the hospital was still called Seattle Grace, and hasn't been seen since season 6.
For those who don't remember, Olivia slept with George (T.R. Knight) and gave him syphlis after she contracted it from sleeping with Alex (Justin Chambers).
So when Olivia pops into Sloan Grey Memorial with her son, things might get a bit awkward for Jo (Camilla Luddington) and Alex.