https://variety.com/2025/tv/news/kate-walsh-greys-anatomy-season-22-guest-star-1236600004/

Dr. Addison Montgomery is scrubbing back into Grey’s for the Jan. 29 episode titled “Strip That Down.” Walsh last appeared on Grey’s in April 2023.

New Grey's Anatomy Season 22 Trailer Confirms Addison Montgomery's Return After 3 Years (https://screenrant.com/greys-anatomy-season-22-episode-10-trailer-addison-return/)

Kate Walsh reprises her role as Addison Montgomery in Grey's Anatomy season 22, marking her return to Grey Sloan after a three-year absence.