Terry and the Pirates (1952)

Last on with suspect sound is episode 375

Terry and the Pirates (1952)

"Macaco Gold"

Hotshot Charlie's plane, with its cargo of gold bullion, is hijacked by the Dragon Lady's operatives while en route to Japan. Terry Lee and Chopstick Joe deduce that the gold could only be disposed of it the Portugese colony of Macao and Terry flies there to attempt to recover the precious cargo.