Graham Phillips

Ben Tennyson

Christien Anholt

Eon

Haley Ramm

Gwen Tennyson

Beth Littleford

Sandra Tennyson

Don McManus

Carl Tennyson

Sab Shimono

Old Man

Aloma Wright

Mrs. Dalton

Robert Picardo

Principal White

Lee Majors

Grandpa Max Tennyson

Tyler Patrick Jones

Cash

Tyler Foden

T-J

Paige Hurd

Stephanie

David Franklin

Heatblast (voice)

Carlos Alazraqui

Grey Matter (voice)

Daran Norris

Diamondhead (voice)

Dee Bradley Baker

Wildmutt (voice)

Antoinette Spolar

Talent Show Teacher

Michael Runyard

Fire Chief Whittington

Joey Box

Police Officer #1

Alex Winter

Constantine Jacobs

Rich Ting

Heatblast