Will Webber make it out alive? Will Meredith and her baby be okay? What is in store for a number of our favorite couples?

There are certainly a number of questions surrounding the Grey's Anatomy Season 10 premiere, but while Shonda Rhimes remains mum on most answers, we can at least confirm the following:

Veronica Cartwright - a veteran actress known for supernatural roles on Invasion, The X- Files and Eastwick - will guest star on the two-hour September opener. Details on her role remain unclear at this time.

ABC has also announced that Bobby Campo and Heather Hemmens will stop by the premiere and both may also turn up later in the season.

Grey's Anatomy returns with new episodes on Thursday, September 26.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.