Richard Carlson

as Bishop Finley

as Champ Connors

as Prof. Norman E. Van Zandt

as Tom Stewart

as Russell Wade

as Mr. Fiction Writer

as William B. Travis

as Dr. David Reed

as Narrator (voice)

as Henry Murdoch

as Gerald MacTeam

as John Putnam

as Major Degan

as Dr. Jeffrey Stewart

as Lt. (j.g.) Joe Rodgers

as Capt. Paul Hansen

as Gil Stanton

as John Goode

as Ross Stewart

as Martin Abbott

as Charles Winslow / Charles Winslow Sr.

as Owen Vail

as Bill Adams

as David Hewitt

as Doctor Jackson

as Curt Stanton

as Clint Kelly

as Thomas Jefferson

as Geoff Montgomery

as James Houston

as Joe

as Duncan Macrae