Characters played by Dee Bradley Baker
Numbuh 4 - Wally Beatles
Mr. Fibb
Toilenator
Joaquin
Tommy Gilligan
Delightful Children from Down the Lane
Additional Voices
Characters played by Ben Diskin
Numbuh 1 - Nigel Uno
Numbuh 2 - Hoagie P. Gilligan Jr.
Numbuh 101 - Matthew
Delightful Children from Down the Lane
Characters played by Cree Summer
Numbuh 5 - Abigail 'Abby' Lincoln
Cree Lincoln
Delightful Children from Down the Lane
Characters played by Lauren Tom
Numbuh 3 - Kuki Sanban
Characters played by Ogie Banks
Sector Z Numbuh 0.1 - Bruce
Characters played by Jeff Bennett
Mr. Boss
Mr. Fizz
Benedict Wigglestein
Characters played by Cam Clarke
Additional Voices
Characters played by Grey Griffin
Crazy Old Cat Lady
Gramma Stuffum
Characters played by Jennifer Hale
Numbuh 86 - Francine 'Fanny' Fulbright
Numbuh 363 - Harvey McKenzie
Computer
Characters played by Mark Hamill
Stickybeard
Characters played by Jason Harris
Chad Dickson
Characters played by Janice Kawaye
Numbuh 83 - Sonya
Numbuh 84 - Lee
Characters played by Tom Kenny
Knightbrace
Chester
Mr. Wink
Sector Z Numbuh 0.2 - David
Additional Voices
Characters played by Maurice LaMarche
Father
Characters played by Matt Levin
Numbuh 60 - Patton Drilovsky
Characters played by Rachael MacFarlane
Numbuh 362 - Rachael T. McKenzie
Sector Z Numbuh 0.3 - Ashley
Characters played by Candi Milo
Additional Voices
Characters played by Daran Norris
Count Spankulot
Janitor
Characters played by Neil Ross
Grandfather
Characters played by Frank Welker
Monty Uno
Characters played by Dave Wittenberg
Numbuh Zero
Sector Z Numbuh 0.4 - Lenny