From serial killing on Bones to... who knows what on Grey's Anatomy?

TV Line reports that Andrew Leeds - who has been stalking Booth, Brennan and Fox viewers as Christopher Pelant, including on this week's Bones season premiere - will play a key role on the medical drama.

Details on Leeds' Grey's Anatomy Season 9 role remain under wraps, though it's been confirmed that the actor will NOT come on board as a doctor.

Answers in general surrounding life at Seattle Grace will start to be answered soon. The ABC drama returns with new episodes on September 27.

What role will Leeds take on? Let the guessing games begin!

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.