Daredevils of the Red Circle (1939) is a 12-chapter Republic Movie Serial starring Charles Quigley, David Sharpe, Herman Brix (better known under his subsequent stage name, Bruce Bennett), Carole Landis, Miles Mander (in a dual role) and Charles Middleton.

Through a series of deadly traps, and with the help of a mysterious cloaked figure, known only as "The Red Circle", the daredevils begin to unravel the truth.

The loss of weight will tip the scale, causing deadly gas capsules to break upon the floor, killing Granville in a very short time.

[1] Ironically, David Sharpe, who is generally considered to have been one of the greatest stuntmen in the movies, had to be doubled in action scenes by Jimmy Fawcett because he was playing a leading role, and the studio could not risk any production delays were Sharpe to suffer injury.

[1] In the early 1950s, Daredevils of the Red Circle was one of fourteen Republic serials edited into a television series.