Characters played by Christopher George
Hagen Arnold
Characters played by Greta Baldwin
Karen Summers
Characters played by Henry Jones
Dr. Crowther
Characters played by Monte Markham
Gregory Gallea
Characters played by Harold Gould
Col. Holt
Characters played by Phillip Pine
Dr. Lee Craig
Characters played by Lee Delano
Dr. Tony Verity
Characters played by Ivan Bonar
Col. Cowen
Characters played by Robert Cleaves
Dr. George Tarvin
Characters played by Charles Irving
Maj. Tolley
Characters played by Sheila Bartold
Sybil Dennis
Characters played by Patrick Wright
Stover
Characters played by Maryesther Denver
Overseer
Characters played by Keye Luke
Sen Chiu
Characters played by Ed Prentiss
Hicks
Characters played by Walt Davis
Highway Patrolman