If you happen to bump into Kate Burton after watching Grey's Anatomy tonight, don't tell her what happens.

The Boston Globe reports that the actress, who plays mom to Boston-area native Ellen Pompeo on the ABC show, doesn't have TiVo, and will be in Boston tonight, starring in "The Cherry Orchard" at the Huntington Theatre.

But the Broadway star and Emmy-nominated portrayer of Alzheimer's-afflicted Dr. Ellis Grey knows there's something big in store.

"There are some big surprises. I can tell you that this is the one episode where you will see more of [me] than you've ever seen before," Burton told the Globe. "But we really don't know where it goes. They don't tell us, so we won't tell all of you."

In her downtime, the daughter of Richard Burton and Sybil Williams said she's been flying back and forth to L.A. to see her husband, former Williamstown (Mass.) Theatre Festival producer Michael Ritchie.

We're looking forward to seeing the talented Burton's return to Grey's Anatomy tonight, and learning where that story line leads.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.