• Arnie Niekamp (Episode 8: My Riddle Pony) •
Justin McElroy (Episode 12: Three Men and A Riddle Lady) • Brooke Breit (Episode 21: Jester Tester) • Zach Reino (Episode 24: Hey Year's Re:SOLUTIONS!, Episode 259: Go and Be Good) • Jess McKenna (Episode 24: Hey Year's Re:SOLUTIONS!, Episode 259: Go and Be Good) • Becca Barish (Episode 29: Dungeons & Dragons & Riddles, Episode 229: Paul Turkey Mall Turkey) •
Jon Gabrus (Episode 45: Lucky Songbird!) •
Hayes Davenport (Episode 48: Boat Detective) •
Janet Varney (Episode 51: JANETMORPH!, Episode 178: ... and Whatnot, Episode 189: Escape!, Episode 200: John Travolta's Half Birthday, Episode 221: Planchette Poltergeist, Episode 253: Are Grandmas Lisas?, Episode 276: Rayzle Dayzle, Episode 296: Skip this one!, Episode 297: There's No Rules That Say A Dog Can't Not Do Riddles, Episode 315: Daisy in the Naisy) •
Jeffrey Cranor (Episode 54: A Star Is Wars!, Episode 197: Leprechaun Lingerie) • The Teachers Lounge (Episode 57: The Question Is The Answer!) •
Demi Adejuyigbe (Episode 92: Unicorn Boner) • Geoffrey James (Episode 105: Milk Store) • Reilly Anspaugh (Episode 105: Milk Store, Episode 240: Butt. Teeth. Brains.) •
Freddie Wong (Episode 112: Riddies & Daddies) •
Beth May (Episode 112: Riddies & Daddies) •
Will Campos (Episode 112: Riddies & Daddies) • Mary Holland (Episode 115: Bug!) • Dan Lippert (Episode 124: Big Grande Part 1, Episode 211: Or Else Forget About It!) • Drew Tarver (Episode 124: Big Grande Part 1) • Ryan Rosenberg (Episode 124.5: Big Grande Part 2, Episode 211: Or Else Forget About It!) • Jon Mackey (Episode 124.5: Big Grande Part 2, Episode 270L Guess This Mess) • Branson Reese (Episode 168: Riddles Tales of Magic) • Carly Monardo (Episode 168: Riddles Tales of Magic) • Holly Laurent (Episode 169: Edward Splinterhands) • Greg Hess (Episode 169: Edward Splinterhands) • Johnny O'Mara (Episode 185: Dr. Very Good Body) • Elizabeth Andrews (Episode 187: Edge of the Couch) • Michael Hitchcock (Episode 205: The Ol' Happy Cabbage, Episode 247: Hollywood Hot Takes) • Emily Gonzalez (Episode 212: Too Riddies; Didn't Puzzies) • Kyle Ayers (Episode 224: Duckman Joe Millionaire) • Sandy Weisz (Episode 226: SANDY?!) •
Thomas Sanders (Episode 236: Thomas the Riddle Engine) • Alfred Bardwell-Evans (Episode 240: Butt. Teeth. Brains.) • Jasper Cartwright (Episode 242: Cool Ranch Latte) • Mano Agapion (Episode 246: Hey Factoid Factoid) • Mark McConville (Episode 260: Garson Arson Larson) • Tim Platt (Episode 262: Mummy Issues) • Ali Fisher (Episode 262: Mummy Issues) • Peih-Gee Law (Episode 266: SAW(LVE)) • Joe Lepore (Episode 267: Tub Gin & Flagons) • Christopher Hastings (Episode 267: Tub Gin & Flagons) • David Brown (Episode 270: Guess This Mess) •
Seth Morris (Episode 271: BudWizArd) • Ian Karmel (Episode 273: Three Donatellos) • Erin Whitehead (Episode 281: A Tale of Two Erins) • Jordan Morris (Episode 294: Never Stand Behind a Batman) • Casey Toney (Episode 295: Can You See My Muscles Through the Phone?) • Josh Gondelman (Episode 298: 2 Hams in a Clam) • Anthony Burch (Episode 308: PsyCoco) •
Rekha Shankar (Episode 209: I'm Actually Quite Cool!) • Katie Rich (Episode 312: Answer Hogs) • Paul F. Tompkins (Episode 315: Daisy in the Naisy) •
Ross Bryant (Episode 376: All Pervert's Eve) == Episodes ==