Watch Shadow of a Doubt (1943) (1943) HD Full Movie Free on SolarMovie. Watch Shadow of a Doubt (1943) (1943) online free. A teenage girl, overjoyed when her favorite uncle comes to visit the family in their quiet Californi...A teenage girl, overjoyed when her favorite uncle comes to visit the family in their quiet California town, slowly begins to suspect that he is in fact the "Merry Widow" killer sought by the authorities.