Grey's Anatomy

Grey’s Anatomy Season 11, Episode 17 Sneak Peek: Derek’s Explanation (VIDEO)

Derek (Patrick Dempsey) is back in Seattle, but he's not allaying any of Meredith's (Ellen Pompeo) concerns in the below sneak peek for the episode of Grey's Anatomy airing this Thursday, March 26 — Season 11, Episode 17: "With or Without You."

As the scene starts, it's daytime, and Mer is anxiously fussing with the house as Derek tries to explain why a woman picked up his phone when Meredith called.

"I left my phone at the lab," Derek says. "By the time I figured out I left it, I was already at the airport coming to you … I called her from the airport. Then she told me she spoke to you."

Derek swears that that's the whole story, and that the woman is only his research fellow and nothing more, but Mer is skeptical.

"I wish I could believe you," she says.

"You can," Derek responds. "I'm here."

"I know how this works. I was your resident once," Mer contends. "It seems like you came home because you thought you were in trouble."

"I came home because we're in trouble," Der says.

Either he's trying to divert the scrutiny or he actually is concerned for their marriage. From the promo of this episode we saw last week, it certainly seems like Der is conveniently neglecting to mention some heavy flirting.

We'll have to see how much of the truth comes out when Grey's Anatomy Season 11, Episode 17 — "With or Without You" — airs this Thursday, March 26, at 8 p.m. ET on ABC.