Board Thread:General Discussion/@comment-24979796-20140616134840/@comment-4287993-20140617145712

Actually, I was thinking about it and Derek is the only one who knows the three of them. Bailey seems to know Sam, and of course Addison, but I don't think she properly met Naomi. Meredith, Alex, Callie, and Richard are the only ones left who know Addison, because Mark is dead and Arizona only seems to know Addison superficially.