Better hope all those longtime Grey's Anatomy actors have made their amends with Isaiah Washington! The 50-year-old actor — who played Preston Burke for the show's first three seasons before being fired amid an alleged gay slur scandal — is officially back on set to film his appearance in an upcoming Season 10 appearance.

Isaiah is back at his old stomping grounds — The Prospect Studios in the Los Feliz neighborhood of Los Angeles, where Grey's has been in production for the last decade.

And if you don't believe it, check out his recent Twitter photo, which shows his script. Unfortunately for us spoiler hounds, the snapshot gives away nothing: It's just the cover of the script with a huge warning that the teleplay must remain confidential and must not leave the premises.

"It's game time," Isaiah writes in the caption. "#BurkeIsBack."

Looks like Shonda & Co. are desperate to keep the circumstances of Burke's return under wraps — and justifiably so! Ever since it was announced that Burke would be making a comeback, we've been speculating that his return plays into Cristina's (Sandra Oh) departure from the show.

What will bring Burke back to the hospital? Share your ideas in the comment section below!

Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!