First there was McDreamy (Patrick Dempsey).

Then along came McSteamy (Eric Dane).

Now, the women of Grey's Anatomy may have to come up with a brand-new nickname now that actor Tim Daly is on his way to Seattle Grace Hospital.

Daly, 51, best known for his role on Wings, will appear on a special two-hour episode of the ABC drama that could serve as a springboard for the much-touted spinoff series, according to The Hollywood Reporter.

The spinoff would star the character Addison Montgomery (played by the lovely Kate Walsh), ABC reps confirmed to People in February.

Actor Taye Diggs has also signed on to appear in the expanded episode, which is scheduled to air later this spring.

According to The Hollywood Reporter, Daly's character is described in a production breakdown as "handsome, sincere, like a McDreamy."

Paul Adelstein, who plays the double-crossing Secret Service agent, Paul Kellerman on FOX's Prison Break (and who was also considered for the role of Dr. Burke, which went to Isaiah Washington) has also been cast, though it's unclear what role he will play.

Grey's Anatomy creator Shonda Rhimes is writing the special, two-hour episode, the details of which are being kept under wraps. USA Today reports, however, that the basic gist will feature Addison mulling a new job offer.

Should the episode be warmly received and the network decide that the spinoff will go forward, Addison will most likely accept the offer.

Daly most recently starred in ABC's critically lauded drama The Nine.

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