A brand new episode of Grey's Anatomy airs this week, and supposedly, the Kevin McKidd (Owen Hunt)-directed Season 9, Episode 4: "I Saw Her Standing There" (airing October 25) is a lot lighter and funnier than the emotionally heavy episodes we’ve seen so far this season. And who couldn’t use a good elephantitis joke after the death of a loved one?

Here’s a roundup of what to expect this Thursday.

“Hugely inflamed testicles.” Yes, you read that correctly. Kevin says that the doctors at Seattle Grace-Mercy West will be dealing with a crazy new case. A patient comes in with a severe case of enlarged anatomy, which will surely fuel enough humor to keep us (and the docs) laughing throughout the episode.

April and Jackson are doin’ it. In the hospital! In this preview, April (Sarah Drew) and Jackson (Jesse Williams) are not only having sex, but they’re having lots of it, and while they’re at work. They can’t keep their hands off of each other, these two. So much for that whole de-virginization plan!

Catherine Avery is back. According to the ABC press release, “Richard [James Pickens Jr.] calls on Dr. Catherine Avery to help him perform a complicated procedure.” Hmm... could he be calling on her for other, more salacious reasons as well? Expect a face-off between Richard and Jackson, and watch a sneak peek of Catherine’s arrival here.

Derek has a new job. In sneak peek photos, we see Derek (Patrick Dempsey) in his new role as a teacher. And he’s smiling! 

Meredith walks on eggshells. He may seem happy about his new job outside of the OR, but Meredith (Ellen Pompeo) worries that he’s just in denial. Because of this, she decides not to talk about any of her surgeries around him, which will likely be awkward. 

Calzona in trouble. Mean Arizona (Jessica Capshaw) isn’t going away just because of one bonding moment with Callie (Sara Ramirez) in the shower last week. She’s still giving Callie a hard timeabout her insensitivity, which actually seems non-existent. 

Arizona’s next step. Arizona will be shown her new prosthetic leg, but that doesn’t mean she’s going to like it. 

Cristina has a sex friend. Cristina (Sandra Oh) is getting frisky in Minnesota with a co-worker! Is it the sort-of-handsome Dr. Wilson, who told her to smile last week? And is she just doing this to get back at Owen for cheating on her, or does she actually like him?

For more Grey’s spoilers, click here.

Catch the next new episode of Grey’s Anatomy on Thursday, October 25 at 9 p.m. ET/PT on ABC.

Molly Friedman is an editor at Wetpaint Entertainment. Follow her on Twitter @MollyFriedman.

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