Characters played by Rod Serling
Narrator
Characters played by Josef Blumrich
Self - NASA Engineer (as J.F. Blumrich)
Characters played by Duncan A. Lunan
Self
Characters played by Art Ford
Self
Characters played by Sidney Fox
Self (as Dr. Sidney Fox)
Characters played by Leslie Orgel
Self (as Dr. Leslie Orgel)
Characters played by Fernando Cabieses
Self - Neurosurgeon (as Dr. Fernando Cabieses)