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'Grey's Anatomy' is back this week. Here's everything you should know about season 18.

Esme MazzeoOct 1, 2021, 04:22 IST

Kate Walsh and Ellen Pompeo in "Grey's Anatomy" season 18 episode three, "Hotter Than Hell."ABC/Eric McCandless

"Grey's Anatomy" season 18 premieres Thursday, September 30 at 9 p.m. ET.
It has been announced that Kate Walsh will return as fan-favorite Dr. Addison Montgomery.
Peter Gallagher is also a guest star this season.

Kate Walsh is returning as fan-favorite Dr. Addison Montgomery

Kate Walsh on "Grey's Anatomy." Vivian Zink/Walt Disney Television via Getty Images

Kate Burton will also return to play Meredith's mother, Ellis Grey

Kate Burton and Ellen Pompeo on "Grey's Anatomy." Scott Garfield/Disney General Entertainment Content via Getty Images

Peter Gallagher will play a neurosurgeon named Dr. David Hamilton

Peter Gallagher. Mark Davis/Getty Images for IMF

Abigail Spencer will also return as Owen's sister, Megan Hunt

Abigail Spencer. Frederick M. Brown/Getty Images

The season premiere will center around an accident at a fair

"Grey's Anatomy" star Ellen Pompeo. ABC/Richard Cartwright

Jo Wilson debuts a new look

Camilla Luddington as Josephine "Jo" Wilson. ABC

COVID-19 will not likely be a major storyline in season 18

Grey's Anatomy. ABC/Jessica Brooks

The season premiere is an action-packed crossover event with "Station 19"

Kate Walsh and Ellen Pompeo in "Grey's Anatomy" season 18 episode three, "Hotter Than Hell." ABC/Eric McCandless

An all-Black alliance called 'The Cookout' got 'Big Brother' its first Black winner. 8 houseguests tell us why it worked.