Dr. Erica Hahn is faced with the choice to operate on one of the most famous cardio-thoracic surgeons in history, Dr. Tapley. Evidently he was a mentor of Richard Webber's. She doesn't want to do it because he is in pretty bad shape and she doesn't want to be responsible for killing this famous surgeon. After Richard steps up and demands she do it, she concedes, but still is planning for her terrible fate. The surgery does have a complication, but while she's shooting off her mouth to Richard about how her name is going to be ruined, he interrupts her to say that the problem is solved - he solved it while she was busy shooting off her mouth at him.

The real interesting plot with Erica involves Callie Torres and Mark Sloan, though. Mark walks into the cafeteria, sits by Callie and announces, "We're gonna sit and enjoy a meal together." "I don't get it," she replies. "I've turned over a new leaf," Sloan reveals,"from now on if you want this (points down) you're gonna get this, too (points to his brain)." "EW!' Up walks Erica, "Shove over Sloan, Torres and I are going to share a sapphic salad." "Did I miss something?" asks a confused Sloan. "Yah! We're lovers. Didn't you know," says Callie teasingly. Erica chimes in, "Its a love that dare not speak its name." Callie looks at Sloan, "Look me in the eye and tell me that you're not thinking about a threesome?" Mark insists he's not and excuses himself from the table.

Callie keeps asking Mark to meet her in on-call rooms because she needs to "clear her head." Mark starts talking about Erica saying, "C'mon, you never thought of reaching across the O.R. table, pulling down her mask, and ripping of her scrub cap so that you can grab a handful of that blond hair." Callie uncomfortably dismisses the thought.

To add to it all, the two girls are on the elevator when Sloan walks on at the end of the day. They start teasing about the threesome. "You couldn't handle both of us. . . .wouldn't you be too intimidated. . ." Then Erica Hahn reaches over to the back of Callie's neck and pulls her in for a big kiss. Hello? Mark is obviously turned on. Erica leaves, and Mark suggests an on-call room. A confused Callie emerges from the elevator and follows Mark Sloan. If that wasn't surprising, I don't know what was. It happened, and still we have no idea what it really means. Is she, isn't she? I don't know.

more from this episode. . .