These days, Mark-Paul Gosselaar can be found playing the Bash-end of TNT's legal dramedy, but with the show on hiatus and poised to return for a third season, Gosselaar appears to have room in his schedule for a guest appearance or two. That includes a spot in tonight's season premiere of, as well as a guest appearance in another one of ABC's Tuesday night comedies.As EW previously reported, the formerstar is set to appear in tonight's premiere episode of, playing himself, much in the way James van der Beek regularly does in the comedy.'s Frankie Muniz will also appear in the comedy when it makes its second season debut on ABC this evening. But Gosselaar's not done with ABC's Tuesday night line-up. This week, EW reports that the actor is set to appear in, playing Max's new roommate Chase in Episode 10 of the third season.Gosselaar is suited up for his regular gig onthese days, as he stars alongside Breckin Meyer as two friends and streetwise attorneys working at a prestigious law firm. Prior to, Gosselaar starred in the short-lived. And between legal dramas, he managed to squeeze in a guest spot onthat had him showing Nancy a good time (to put it mildly). Whilehas its humorous elements, Gosselaar's ABC guest spots should give him the opportunity to really show off his sense of humor once again. I'm particularly excited to see how he represents himself in tonight's, but thespot also has a lot of potential to be legendary! He follows in the footsteps of Fred Savage as a beloved celeb from the 80s/90s who made an appearance on the ABC comedy.