Great news for all fans. Summer will also be in the upcoming episode 8×17 “One Step Too Far” of Grey’s Anatomy as nurse Emily Kovach. That means that she has a recurring role and maybe we will see more of her.
Here is the short synopsis:

“One Step Too Far” – Derek encourages a hesitant Meredith to work with him again in neurology; Jackson’s mother, Catherine Avery, returns to Seattle Grace with a urology fellow and develops an interest in Richard; and Cristina becomes increasingly suspicious of Owen’s every move. Meanwhile, Alex tries to deny the fact that Morgan may be falling for him, on “Grey’s Anatomy,”
Guest Starring Debbie Allen (“Fame”) as Catherine Avery, Summer Glau (“Firefly”) As Nurse Emily and James Avery (“The Fresh Prince of Bel-Air”) as Sam
THURSDAY, MARCH 15
(9:00-10:02 p.m., ET) on the ABC Television Network.

The episode will air Thursday, March 15 at 9/8 C on ABC.

Source: ABC Press Release