Douglas Barr

as Sam

Royal Dano

as Wrenchmuller

Ariana Richards

as Kathy

J.J. Anderson

as Brian (Duck)

Gregg Berger

as Klembecker

Wayne Alexander

as Vern

Fred Applegate

as Russell

Patrika Darbo

as Mrs. Vanderspool

Tonya Williams

as Ernestine

William Holmes

as Dumb Guy #1

Kevin Thompson

as Blaznee

Jimmy Briscoe

as Captain Bipto

Tony Cox

as Pez

Debbie Lee Carrington

as Dr. Ziplock

Tommy Madden

as Giggywig

Jeff Winkless

as Captain Bipto (voice)

Bruce Lanoil

as Pez (voice)

Joe Alaskey

as Dr. Ziplock (voice)

Tony Pope

as Giggywig (voice)

Patrick Read Johnson

as Commander / Enforcer Drone (voice)

Kirk R. Thatcher

as Shortstuff (voice)