Lena Dunham and the Girls company are currently filming the show's upcoming fifth season, and have found quite the intriguing guest star.

According to TVLine, Lucy Liu, star of CBS' Elementary will appear in a Season 5 episode of Girls. But the actress won't exactly be playing a character. Rather, Liu will be playing a version of herself.

It's unclear whether or not her Elementary co-star Jonny Lee Miller will appear as well, though Liu doesn't look like she's exactly on her own in these photos from the Girls set. Take a look and see what you think. Yeah, we're confused too. If only Sherlock was around to help us puzzle out this mystery!

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How might a version of Lucy Liu meet Hannah and the gang? Hit the comments with your best guesses.

(Full disclosure: TVGuide.com is owned by CBS)

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