A Clear and Present Danger The son of a U.S. Senator takes on the cause of clean air when a friend dies of emphysema. Details Casts Title A Clear and Present Danger Release Date 1970-03-21 Runtime 01 Hours 38 Minutes Genres TV Movie Drama Production Companies Universal Television Production Countries United States of America Hal Holbrook Hays Stowe E.G. Marshall Senator Stowe Joseph Campanella Jordan Boyle Jack Albertson Dr. Chanute Pat Hingle Salem Chase Sharon Acker Erin Stowe James Douglas Howard Eager Mike Kellin Professor Duke Jeff Corey Beiseker Bernie Hamilton House Michael Bell Elliot Morse Cindy Eilbacher Norma Stowe Adrienne Marden Amanda Shamokin Harry Basch Health Commissioner Robert Heinz Preston Gardiner Marian Collier Nurse Robert Quarry Hollis Kent Ray Ballard Bellboy (uncredited) George DeNormand Reporter (uncredited)