‘Grey’s Anatomy’ Surprise: Fan Favorite Former Guest Star Joins ABC Medical Drama As Series Regular For Season 18

deadline.com:

SPOILER ALERT: The story includes a detail about tonight’s Season 18 premiere of Grey’s Anatomy.EXCLUSIVE: Scott Speedman, one of the most memorable guest stars in Grey’s Anatomy history, has joined the cast of ABC’s venerable medical drama as a series regular for its upcoming 18th season.

Speedman just made his first appearance in the Grey’s Anatomy season premiere as the surprising reveal to the “someone from Meredith’s past comes back” tease ABC has been running in promos for Thursday’s premiere. (You can see it below.)Since Grey’s Anatomy alumna Kate Walsh will be reprising her role as Addison in multiple episodes this coming season (as Deadline revealed earlier this month), many fans assumed that the tease was a reference to her return