Drs. Shepherd, Yang and Grey (the younger) consult with a man about an important medical decision to be made. From "Physical Attraction, Chemical Reaction."

Lexie does everything she can for a small patient ... but will it be enough? We will have to wait and see.

Derek Shepherd (Patrick Dempsey), Lexie Grey (Chyler Leigh) and Cristina Yang (Sandra Oh) in the episode called "Physical Attraction, Chemical Reaction," from Season Four of Grey's Anatomy.

Derek and Lexie discuss a case with a patient and other staff members. We like these two together... so long as there's no romance involved!

You can't deny that the younger Grey sister is a cutie ... even if you don't approve of her flirtations with other characters! Lexie Grey has made an impression on viewers in Season 4.

... Mouse? George meets a woman dressed in costume. Hey, it's Halloween and anything goes.

Lexie Grey is a cutie, even wearing pigtails and yellow scrubs. We look forward to seeing more and more of this character.

Richard talks with George and Lexie about a patient. The Chief is always a steady, strong presence at the hospital.

Lexie talks to a mouse... or a human dressed as one for Halloween. It may also be another animal... we can't really tell!

George and Lexie chat as she wears an interesting outfit. We like watching these two interact. She is growing on us!

George and Lexie look a little bit sad in this picture. What for? We will soon find out in "Haunt You Every Day."

Maybe it's the love doctor? Seriously. Can we get a love interest for this girl already? We're getting to like Lexie.