The Dow Hour of Great Mysteries is a 1960 series of seven television specials hosted by Joseph Nye Welch.

The Shadow battles a villain known as The Black Tiger, who has the power to make himself invisible and is trying to take over the world with his death ray.

Steady, dependable Coast Guard Lieutenant Raymond "Ray" Dower and reckless aviator Thomas "Speed" Bradshaw are the closest of friends. Ray saves the life of Captain Tobias Bliss, tramp steamer skipper, in a daring rescue at sea. Speed flies the injured man back to the base hospital, where the two officers later visit him. There Ray meets Nancy Bliss, Bliss' grand-daughter, and falls in love with her. Speed meets her at a dance and urges Ray to propose before some other guy does. Ray is assigned to flood rescue duty, and Speed and Nancy start going out together and discover they are in love.

With no other prospects, a World War I veteran puts the skills they taught him in the War to use.

Escaped Prisoner 39013 impersonates the rich and influential Horace Granville, allowing him to create a variety of disasters. Fortunately, he is thwarted repeatedly by three daring circus daredevils.

Mandrake and his team attempt to prevent "The Wasp" from stealing and using a new Radium invention.

Jackie Gleason and Jack Durant are teamed for the first and only time as Hank and Jed, a pair of dimwitted barbers who are forced into bankruptcy because all their customers have marched off to war. Figuring that if you can't beat 'em, join 'em, Hank and Jed try to join the Army themselves, only to be rejected for a variety of reasons (When asked to read the eye-chart, Hank says he can't-not because he can't see, but because he can't read).

A white youth raised in the jungle by animals is captured by a safari and brought back to civilization as an attraction in a circus.

On the outbreak of the Second World War an idler is forced to join the army by his domineering wife.