Things are heating up in Seattle, and we're not talking about the Summer weather. This week, we got all kinds of new tidbits about the landmark 15th season of Grey's Anatomy. Not only do we have a steamy new theme — the new bank of episodes will mark a "Season of Love" — but we also got a premiere date and a confirmation that the first episode will be two hours long! It's a good week to be a Grey's fan. To keep up the excitement, we decided to dig around and figure out who's definitely on board to appear in the new season. Let's go over who's definitely coming back, who's a bit up in the air, and who we're just kind of holding out hope for (*cough* Dr. Marsh *cough*).
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