Ed Asner

Mr. Harris (voice)

Angela Bassett

Miles' Mom (voice)

Lucas Black

Randy (voice)

Theodore Borders

Martin at Age 12 (voice)

LeVar Burton

Martin at Age 26 (voice)

Jessica Garcia

Maria (voice)

Danny Glover

Train Conductor (voice)

Whoopi Goldberg

Mrs. Peck (voice)

Samuel L. Jackson

Turner (voice)