In 1928, the film had been released as the silent Der Rote Kreis in Germany, where it was shot; English dialogue was apparently dubbed in much later using the De Forest Phonofilm process controlled by BSFP's corporate parent.
1928 hade filmen haft premiär som stumfilmen Der Rote Kreis i Tyskland där den spelades in; engelsk dialog dubbades tydligen in mycket senare med hjälp av De Forests Phonofilm-process som kontrollerades av BSFP:s företagspartner.