Spudvisor
Priscilla Quintana

Jacqueline "Jax" Zhou (23 episodes)

Noah Huntley

Professor Donovan Osborn (23 episodes)

Vikash Bhai

Professor Martin Shral (23 episodes)

Oliver Dench
Akshay Kumar
Luke Fetherston

Harlan Fried Jr. (10 episodes)

Younger Harlan Fried (4 episodes)

Martin Bobb-Semple
Tommie Earl Jenkins

Professor Ellison Pevney (13 episodes)

Kwame Agyei
Ben Cross

Harlan Fried (4 episodes)

Jonathan Kerrigan

Seeker Creston Hubbell (3 episodes)

Johann Urb

Captain Jaworski (2 episodes)

Dino Kelly

Lt. Cade Collins (1 episode)

Richard Blackwood

Billy Dwayne Ross (1 episode)

Douglas Reith

Prescott Fleming (1 episode)

Maryam D'Abo
Nathan Cooper

Academy Librarian (1 episode)

Erin Gray

Captain Beth Grant (1 episode)

Marc Crumpton

Marcus Taylor (1 episode)

Jeffrey Combs

Berman Livingston (1 episode)

Adam Shepherd
Chris LeDoux

Visual Effects Supervisor (1 episode)

Mikael G. Betru

Visual Effects Producer (1 episode)