Vera Vague (Barbara Jo Allen) is a reporter aiming to march her editor boss down the aisle. He agrees to marry her if she can uncover a key spy. She nets a whole ring of spies.
With a plot line mostly lifted from 1941's "White Eagle", Columbia's 24th serial (following "The Desert Hawk-1944" and ahead of 1945's "Brenda Starr, Reporter"), "Black Arrow" finds carpet-baggers Jake Jackson and Buck Sherman arriving in Blue Mesa in search of gold.
Feature version of the 1941 American serial film of the same name, made for export only, never shown in the USA in any medium, and evidently a lost film.
Jimmy Bancroft, a fighter pilot, who is recovering from injuries sustained during the Battle of Britain, and Hazel Court, a nurse, come across a pair of rare birds nestling in a field.
Mortimer Brewster, a newspaper drama critic, playwright, and author known for his diatribes against marriage, suddenly falls in love and gets married; but when he makes a quick trip home to tell his two maiden aunts, he finds out his aunts' hobby - killing lonely old men and burying them in the cellar!