In "Retribution" part 2, a man named Yoska has emerged from Dick Grayson's past, claiming to be Dick's grandfather! Where Yoska has come from and why assassins are on his tail are answers that Batman and Nightwing must figure out quickly if they're going to keep this final link to Dick's past alive!
Batman: Gotham Knights #21
Publication Date: November, 2001
Authors: Devin Grayson, Roger Robinson