The 12-episode Universal serial The Adventures of Smilin' Jack is based on the Zack Mosely comic strip of the same name. The title character-minus his trademarked pencil moustache-is played by Tom Brown. Departing radically from the characters and situations of the original funny-paper version, the serial concerns itself with an effort by the Axis powers to take over the fictional island of Mandon. Sidney Toler, then concurrently starring in the Charlie Chan series, plays a ruthless Japanese general, while future Make Room for Daddy star Marjorie Lord is the plucky heroine. The serial's highlight sequence has Our Hero proving his mettle by walking barefoot over a pit of hot coals.
~ Hal Erickson, All Movie Guide