Main Characters Peter Cabot 2 main appearances John McKenzie 2 main appearances Cmdr. Jeff Selkirk 2 main appearances
Recurring Guest Characters Dr. Sam Marlowe 2 guest appearances Sen. Oliver Bartholomew 2 guest appearances Paul Ryker 2 guest appearances Sylvia King 2 guest appearances Adm. Wiley Sloan 2 guest appearances Ronald Bentley 2 guest appearances