Richard Crane
Capt. Cyrus Harding
Marshall Reed
Jack Pencroft
Karen Randle
Rulu of Mercury
Ralph Hodges
Herbert 'Bert' Brown
Gene Roth
Pirate Capt. Shard
Hugh Prosser
Gideon Spillet
Leonard Penn
Capt. Nemo
Terry Frost
Ayrton - The Wild Man
Rusty Wescoatt
Moley - Shard Henchman
Bernie Hamilton
Neb
William Fawcett
Mr. Jackson
George Robotham
Mercurian
Stanley Blystone
Confederate Officer
Roy Butler
Thug in Park
Frank Ellis
Pirate
Knox Manning
Narrator (voice)
Zon Murray
Thug in Park
Frank O'Connor
Confederate Officer
Sid Ross
Mercurian
Tom Tyler
Union Dispatch Rider
Anthony Warde
Confederate Officer
Pierre Watkin
Confederate Officer