McQuinn protects a Rumanian industrialist and his children from enemy agents. Directed by: Sobey Martin Writer: Donald S. Sanford Cesar Romero as Steve McQuinn Gladys Holland as Lucia Valencic John E. Wengraf as Colonel Bucar Initially broadcast on February 16, 1956. The adventures of a U.S. diplomatic courier, as he travels to distant countries with important communiques to America's allies and dodges enemy agents.