After having our worlds rocked by the presence of both Alex Mack (Larisa Oleynik, as Ken Cosgrove's fiancée) and Clarissa Explains It All's Marshall Darling (Joe O'Connor, as Trudy's father) in the same Mad Men episode this past Sunday, it got us thinking about all of the former Nickelodeon, UPN and WB stars of the '90s and early 2000s that the show has redeemed over the years. There's Colin Hanks (of Roswell); Nora Zehetner and Sarah Drew (of Everwood); Matt Long (of Jack & Bobby); Danny Strong (of Buffy); and, of course, Vincent Kartheiser (of Angel), among others. Clearly, the show has an affinity for casting this niche of actors in weighty roles, so who should be next? These are our suggestions:

Tags: All That, Blossom, Clueless, Danny Cooksey, David Lascher, Hey Dude, Jason Behr, Jason Dohring, Leslie Grossman, Lori Beth Denberg, Mad Men, Popular, Roswell, Sabrina The Teenage Witch, Salute Your Shorts, Veronica Mars