It’s a done deal! With the scheduling all worked out, beloved Bones alum Eric Millegan is set to appear in the show’s 100th episode on April 8.

“Zack will be back,” confirms executive producer Stephen Nathan.

As I first reported back in September, the landmark episode will flash back to Booth and Brennan’s first tag-team assignment. “We’ll see Zack during their first case,” says Nathan, “and we’ll see the first meeting between Booth and Zack.”

Who’s going to be the first to welcome Eric (and Zack) back? Ready, set, comments section!

PHOTO CREDIT: Art Streiber/Fox