Watch The Spiral Staircase (1946) (1946) HD Full Movie Free on SolarMovie. Watch The Spiral Staircase (1946) (1946) online free. In 1916, a shadowy serial killer is targeting women with "afflictions"; one night during a thunderst...In 1916, a shadowy serial killer is targeting women with "afflictions"; one night during a thunderstorm, the mute Helen feels menaced.