Conversation so far:
What did Patrick Dempsey do in the 90s?
Dempsey made several featured appearances in television in the 1990s; including lead roles in the TV versions of the films The Player and About A Boy
Did Patrick Dempsey  act in any movies in the 90s?
Dempsey received good reviews, however, as he portrayed real-life Mob boss, Meyer Lansky in 1991 when Mobsters was put on the screen.
Did Patrick Dempsey receive any awards?
In 1987, Patrick Dempsey won the Best Actor in a Motion Picture: Comedy at the 9th Youth in Film Awards for his work in the film Can't Buy Me Love
Did Patrick Dempsey act in any other films besides The Player, About a Boy,  Mobsters, and Can't Buy Me Love?
Dempsey had a high-profile role as the fiancé of Reese Witherspoon's character in Sweet Home Alabama (2002).
Did Patrick Dempsey act in any other TV shows besides the TV versions of The Player and About a Boy?
Dempsey has received significant public attention for his role as Dr. Derek Shepherd (McDreamy) in the drama Grey's Anatomy next to Ellen Pompeo.
Did Patrick Dempsey win any awards for Grey's Anatomy?
In 2007 and 2008 Dempsey won the People's Choice Awards' Favorite Male TV Star for his role as Dr. Derek Shepherd in the TV drama Grey's Anatomy

Question: When did he start in grey's anatomy
Self-contained rewrite: When did Patrick Dempsey start grey's anatomy