Dangerous Assignment was an NBC radio drama series that aired from 1949 to 1953, starring Brian Donlevy as Steve Mitchell, an international operative and U.S. special agent navigating international intrigue and espionage during the early Cold War period. In this episode "Sunken Ships," Steve Mitchell is dispatched to Saigon to investigate the mysterious sinking of three ships, taking him into the dangerous underworld of French Indochina where he must navigate treacherous political waters and uncover the truth behind the maritime incidents.