William Tracy played Terry Lee's sidekick, Hotshot Charlie, in this TV series, but in the serial version of Milton Caniff's comic strip, Terry and the Pirates (1940), he played the title role.
For the series pilot, "Macao Gold", the series' recurring roles of Chopstick Joe and Burma were played by Jack Kruschen and Mari Blanchard respectively. In subsequent episodes, those roles were recast with Jack Reitzen appearing as 'Chopstick Joe' and Sandra Spence as 'Burma'.