'Grey's Anatomy' Season 12 Spoilers: Penny Arrives At Meredith's Party

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Everyone's invited to Meredith's dinner party which will take place this week in the brand new episode of the 12th season of ABC's hit medical drama TV series "Grey's Anatomy."

Titled "Guess Who's Coming to Dinner," spoiler reports (via LatinPost.com) hinted that the Grey Sloan Memorial professionals will be gathering at Mer's place for a dinner party. Despite her wishes to help her sister, Maggie will have to let go of her cooking duties when duty calls for her at the hospital. Taking her place is April, who is more than eager to do something to occupy her mind as she is trying to steer clear of Jackson. Everything is already set, what could go wrong?

As stated by the media outlet, the mood of the party will drastically change when Callie arrives at the house with someone whom she introduced as her new girlfriend. The person in question is Penny and she is apparently the doctor who attended the last moments of Derek's life.

Fans may remember Penny as the doctor tasked to attend to Derek when he was brought to the hospital following his car crash in the last season's finale. Unfortunately, she wasn't able to save the surgeon, consequently leaving two fatherless children and a widow.

Needless to say, her presence is a painful reminder for Meredith who, in the promo teaser, can be seen tucking away the late doctor's picture.

"No worries, universeā€¦I got this!" a tensed Meredith declares to herself as she went out to face the jovial crowd. However, as the night wears on, her convivial mood began to vanish and is replaced with a rather mischievous one.

In the middle of all this, fans are hoping that Alex and the rest of the gang will sense the emotional turbulence their friend is currently experiencing.

Find out how this intense moment unfolds when "Grey's Anatomy" Season 12 airs this Thursday, Oct. 22, at 8 p.m. on ABC.