Mark Fischbach as Mark

Jordan Bradley as Captain

Lio Tipton as Lady

Pamela Horton as Celcionna F. Kelvina

Mick Lauer as Gunther B. Gunnerson

Robert Muyskens as Burt

Steve Taylor as Computer (voice)

Matthew Patrick as Theory Crew

Wade Barnes as Wug

Morgan Calhoun as Bandit

Arin Hanson as Narrator (voice)

Holt Boggs as Shuttle Pilot

Ethan Nestor as Wormhole

Baldermort as Invincible Tower

Tyler Scheid as First Mate

Linda Bradshaw as Dorene L. Whitacre

Brian Wecht as Ninja Crew

Dan Avidan as Sexy Crew

Imane Anys as Cryo Computer (voice)

Seán McLoughlin as Drones

Carlos Pena as Crew 1

Roderick Loving as Crew 2

Jason C Campbell as Crew 3

Judy Lee as Crew 4

Sophia Tinsley as Crew 5

Reggie Lussier as Crew 6

Kai Woodley as Crew 7

Gabriel Leite as Crew 8

Amani Alexander as Crew 9

Adam Weightman as Crew 10

Mo Alfy as Joe (uncredited)

Sara Burke as Window Guard (uncredited)

Danielle Ploeger as Alien Teen