S1E15 · Humanité

Jesse McCartney

Dick Grayson / Robin / Nightwing (voice)

Nolan North

Conner Kent / Superboy (voice)

Danica McKellar

M'gaan M'orzz / Megan Morse / Miss Martian (voice)

Stephanie Lemelin

Artemis Crock / Artemis / Tigress (voice)

Khary Payton

Kaldur'ahm / Aqualad (voice)

Jason Spisak

Wally West / Kid Flash (voice)

Jeff Bennett

Red Tornado / Red Volcano / T. O. Morrow (voice)

Rob Lowe

Captain Marvel (voice)

Peter MacNicol

Professor Ivo (voice)

Vanessa Marshall

Black Canary / Red Inferno (voice)

Stephanie Lemelin

Computer (voice)

Nolan North

Zatara (voice)

Lacey Chabert

Zatanna (voice)