Dimension 20 Wiki
Dimension 20 Wiki

Seasons of Dimension 20 alternate between a "permanent" cast of six players, called the Intrepid Heroes, and a changing cast of four to six guest players. For its Fantasy High live shows, part of the cast starred alongside guest players. For its Misfits and Magic live show, the cast and GM were made entirely of guest cast. There have been eight seasons with the Intrepid Heroes, and fourteen side quests for a total of twenty-two seasons.


The main D20 cast, from left to right: Emily Axford, Lou Wilson, Siobhan Thompson, Brennan Lee Mulligan, Ally Beardsley, Zac Oyama, and Brian Murphy.

Intrepid Heroes

In chronological order, the main cast has starred in:

  1. Fantasy High (season 1)
  2. The Unsleeping City (season 3)
  3. Fantasy High: Sophomore Year (season 4)
  4. A Crown of Candy (season 6)
  5. The Unsleeping City: Chapter II (season 8)
  6. A Starstruck Odyssey (season 13)
  7. Neverafter (season 16)
  8. Fantasy High: Junior Year (season 21)

For a list of other games this cast has starred in, see List of Non-Dimension 20 RPG Games Featuring the Main Cast.

Guest Casts


The cast of Escape from the Bloodkeep, from left to right: top row, Mike Trapp, Ify Nwadiwe, Brennan Lee Mulligan, and Matthew Mercer; bottom row, Amy Vorpahl, Erika Ishii, and Rekha Shankar.

Escape from the Bloodkeep


The cast of Tiny Heist, from left to right: top row, Clint McElroy, Travis McElroy, Brennan Lee Mulligan, and Lily Du; bottom row, Griffin McElroy, Jessica Ross, and Justin McElroy.

Tiny Heist

Pirates of Leviathan

Mice & Murder

Misfits and Magic

The Seven

Shriek Week

Coffin Run

A Court of Fey and Flowers

The Ravening War

Dungeons and Drag Queens


Burrow's End

Never Stop Blowing Up

Live Show Cast

Fantasy High LIVE in Brooklyn

Fantasy High LIVE at RTX Austin

Misfits and Magic Live at GenCon 2022

Cast Trivia

  • Misfits and Magic - Live! at GenCon is the only Dimension 20 show that does not contain any of the Intrepid Heroes or Brennan Lee Mulligan.
  • Brennan Lee Mulligan has appeared in all but two seasons of Dimension 20 as either the DM or a player character. These are Shriek Week and Coffin Run.
  • Brennan Lee Mulligan, Aabria Iyengar, and Matthew Mercer have acted as both DMs and player characters on various Dimension 20 campaigns. Gabe Hicks and Jasmine Bhullar have so far only been the DMs.
  • After Brennan, Lou Wilson and Ally Beardsley are tied for appearing in the most seasons at a total of eleven each. Zac Oyama and Siobhan Thompson tie for third, as they have appeared in ten seasons of Dimension 20, while Emily appears in nine.
  • Brian Murphy has only appeared in the eight Intrepid Heroes seasons, making him the only Intrepid Hero who has yet to be part of a Guest Cast.
  • Aabria Iyengar has featured in six seasons of Dimension 20 either as the DM or player.
  • Erika Ishii appears in five seasons of Dimension 20, but only as a player.
  • Rekha Shankar and Isabella Roland have each appeared in four seasons, only as players.
  • Matther Mercer and Ify Nwadiwe have appeared in three seasons each. Ify is only a player, while Matt is both a player and DM.
  • Five cast members have appeared in two seasons of Dimension 20: Lily Du, Carlos Luna, Mike Trapp, Danielle Radford, and Alex Song-Xia.
  • Thirty one cast members have only appeared in one season of Dimension 20: Amy Vorpahl, Travis McElroy, Griffin McElroy, Justin McElroy, Clint McElroy, Jessica Ross, Krystina Arielle, Marisha Ray, B. Dave Walters, Sam Reich, Katie Marovich, Raphael Chestang, Grant O'Brien, Persephone Valentine, Becca Scott, Dani Fernandez, Gabe Hicks (as DM), Jasmine Bhullar (as DM), Surena Marie, Oscar Montoya, Omar Najam, Anjali Bhimani, Monét X Change, Alaska Thunderfuck, Bob the Drag Queen, Jujubee, Freddie Wong, Hank Green, Rashawn Nadine Scott, Jasper William Cartwright, and Jacob Wysocki.
    • Griffin McElroy also appeared in the Fantasy High Live at RTX event, alongside some of the Intrepid Heroes.
    • Additionally, Brian David Gilbert joined the Intrepid Heroes for the Fantasy High Live In Brooklyn show.
    • Becca Scott had a second appearance in Misfits and Magic - Live! at GenCon, along with Markeia McCarty, Noxweiler Berf, and Michelle Nguyen Bradley who all exclusively appear in this show.
  • Zac Oyama holds the record for most characters played inside of the same universe at 3; Lapin Cadbury, Cumulous Rocks, and Colin Provolone all exist within the Crown of Candy universe.



  • Michael Schaubach

Creative Director



  • Rick Perry and crew [extra]

Art & Illustration

Main Cast
Game Master Brennan Lee Mulligan
Intrepid Heroes Emily Axford | Brian Murphy | Lou Wilson
Siobhan Thompson | Zac Oyama | Ally Beardsley
Side Quests
Season 2
from the
Game Master Brennan Lee Mulligan
Vile Villains Matthew Mercer | Mike Trapp | Ify Nwadiwe
Rekha Shankar | Erika Ishii | Amy Vorpahl
Season 5
Tiny Heist
Game Master Brennan Lee Mulligan
Tiny Thieves Jessica Ross | Clint McElroy | Griffin McElroy
Travis McElroy | Justin McElroy | Lily Du
Season 7
Pirates of
Game Master Brennan Lee Mulligan
Buccaneer Buddies Marisha Ray | Carlos Luna | Matthew Mercer
B. Dave Walters | Krystina Arielle | Aabria Iyengar
Season 9
& Murder
Game Master Brennan Lee Mulligan
Sylvan Sleuths Grant O'Brien | Ally Beardsley | Sam Reich
Rekha Shankar | Raphael Chestang | Katie Marovitch
Season 10
and Magic
Game Master Aabria Iyengar
Magical Misfits Lou Wilson | Brennan Lee Mulligan
Danielle Radford | Erika Ishii
Season 11
The Seven
Game Master Brennan Lee Mulligan
Heroic Highschoolers Erika Ishii | Aabria Iyengar | Isabella Roland
Persephone Valentine | Becca Scott | Rekha Shankar
Season 12
Game Master Gabe Hicks
Players Ally Beardsley | Ify Nwadiwe
Lily Du | Dani Fernandez
Season 14
Game Master Jasmine Bhullar
Fang Gang Isabella Roland | Zac Oyama
Carlos Luna | Erika Ishii
Season 15
A Court of
Fey & Flowers
Game Master Aabria Iyengar
Pack of Pixies Brennan Lee Mulligan | Omar Najam | Oscar Montoya
Emily Axford | Lou Wilson | Surena Marie
Season 17
The Ravening
Game Master Matthew Mercer
Scrumptious Scoundrels Anjali Bhimani | Aabria Iyengar | Lou Wilson
Brennan Lee Mulligan | Zac Oyama
Season 18
Dungeons and
Drag Queens
Game Master Brennan Lee Mulligan
Questing Queens Bob the Drag Queen | Jujubee
Monét X Change | Alaska Thunderfuck
Season 19
Game Master Brennan Lee Mulligan
Prefrontal PIs Siobhan Thompson | Danielle Radford | Mike Trapp
Freddie Wong | Alex Song-Xia | Hank Green
Season 20
Burrow's End
Game Master Aabria Iyengar
Stupendous Stoats Isabella Roland | Brennan Lee Mulligan | Rashawn Nadine Scott
Jasper William Cartwright | Siobhan Thompson | Erika Ishii
Season 22
Never Stop Blowing Up
Game Master Brennan Lee Mulligan
Amazing Action Stars Isabella Roland | Jacob Wysocki | Alex Song-Xia
Ify Nwadiwe | Ally Beardsley | Rekha Shankar
Misc. Fantasy High
Liveshow Guests
Griffin McElroy | Brian David Gilbert
Misfits and Magic
Live at GenCon 2022
Becca Scott | Michelle Nguyen Bradley
Noxweiler Berf | Markeia McCarty