Spaceship to the Unknown

Buster Crabbe

Flash Gordon (archive footage)

Jean Rogers

Dale Arden (archive footage)

Frank Shannon

Dr. Hans Zarkov (archive footage)

Charles Middleton

Ming the Merciless (archive footage)

Priscilla Lawson

Princess Aura (archive footage)

Richard Alexander

Prince Barin (archive footage)

Jack 'Tiny' Lipson

King Vultan (archive footage)

James Pierce

Prince Thun (archive footage)