Grey's Anatomy

Grey's Anatomy Season 11 Episode 2 titled Puzzle With A Piece Missing airs tonight (2 October) and looks like things are about to get intense for Meredith (Ellen Pompeo) and her (secret) step-sister Maggie (Kelly McCreary).

According to the official synopsis for Puzzle With A Piece Missing, Maggie continues to try to make a positive impression at the hospital but finds herself in extremely unfortunate situations.

"It's going to get worse before it gets better," McCreary tells Entertainment Weekly. "Maggie's a professional, but they push each other's buttons professionally. They have different approaches on how to do things. Try as Maggie might, she can't release her stubbornness or other vices, like her tenaciousness, when it comes to working with Meredith," he said.

The episode will also explore Maggie's history, which will give viewers insight into her adoptive family.

"She's talked about how they are a loving, goofy and funny in the scene with Richard [James Pickens Jr.] in the premiere," she says.

"We're going to get a nice taste of that to understand how she's different from them. We're going to see what a great doctor she is. She's a very young woman to be in the position that she's in at the hospital. We're going to see her excellent problem solving skills in action, and we're going to see her awkward social skills in action," he said.

Besides, the Maggie and Meredith drama, fans can also look forward to the upcoming episode exploring more of Dr. Webber's (James Pickens Jr.) storyline. As previously revealed, Webber is Maggie's father - something she doesn't know and something he plans on keeping to himself.

He must deal with the emotional impact of this huge secret while he and the rest of the doctors "work with a dying woman who is being kept alive by her daughter."

Grey's Anatomy Season 11 Episode 2 will air on Thursday, 2 October at 8:00 pm ET on ABC.

Click here to watch the episode online via live stream.