Seymour Friedman had been an assistant director who had filmed several scenes for Columbia's major musical Down to Earth.

He was promoted to full-fledged director in late 1947 and given a Boston Blackie assignment; filming began on December 8.

[4] Trapped by Boston Blackie, continuing in the same familiar pattern of the series, received encouraging notices.

Showmen's Trade Review: "This is an entertaining entry in the Boston Blackie series, with Chester Morris and George E. Stone a good team.

"[5] Motion Picture Herald: "[Morris and Stone] are the center of several exciting episodes which make this a diverting melodrama.