It seems that McDreamy (Patrick Dempsey) is getting a sister this new season on GREY’S ANATOMY (wait didn’t we already meet his sister? Maybe it’s another one…).
And who might be playing this sister you ask? None other than Tiffani Thiessen (Saved By The Bell, Beverly Hills 90210, and more recently What About Brian).

According to Buzzline, Tiffany Thiessen will not only be Derek’s sister, but a Psychologist called by Derek to come and help Meredith deal with her problems.
What might we expect with this new arrival? Apparently a confrontation with Meredith (doesn’t she have confrontations with everyone?) and maybe a love interest in Mark McSteamy (Eric Dane) (that would probably kill Derek, poor thing) or Alex (Justin Chambers).
So far the new character doesn’t have a name, but stay tuned for more information as we get closer to fall.


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