1x1 - Budapest

April 1, 1954

1x2 - Antigua

1x3 - Athens

April 6, 1956

1x4 - Baja

May 3, 1956

1x5 - Batavia

January 2, 1958

1x9 - Casablanca

1x13 - Geneva

While on assignment in Geneva, McQuinn uncovers an assassination scheme involving the Russians.

1x14 - Havana

July 30, 1956

1x15 - Helsinki

July 23, 1956

1x18 - London

July 9, 1956

1x23 - Monte Carlo

While on assignment in Monte Carlo, Steve finds an American intelligence agent who has been severely beaten and robbed. Steve agrees to undertake the agent's assignment - retrieving a roll of film with incriminating photographs of a corrupt politician.

1x24 - Naples

May 7, 1956

1x26 - Paris

February 22, 1955

1x27 - Prague

While in Prague, McQuinn helps a Russian ice-skating star who wishes to defect to the West.

1x30 - Rome

While in Rome investigating the leaking of classified documents from the American Embassy, McQuinn stumbles upon a German counterfeiting plot.

1x32 - Sofia

March 7, 1956

1x33 - Tangiers

Steve tries to help a Bulgarian schoolmaster, hunted by his country's secret police in Tangier, obtain a visa to the United States.

1x34 - Teheran

July 20, 1955

1x35 - Tel Avivi

September 11, 1958

1x36 - Trieste

May 23, 1955

1x37 - Ankara

February 16, 1956

On an airplane Steve meets two children traveling alone who refuse to give their last name. When their aunt fails to meet them at the airport, Steve takes pity on them and allows them to stay in his hotel room. The children's aunt finally arrives, but Steve learns too late that a Romanian industrialist has fled to Crete with a large sum of money and the "aunt" is actually a communist agent who plans to use the children as hostages to force the defector to return behind the Iron Curtain.

1x38 - Vienna

August 19, 1956

1x39 - ZAMBOANGA

June 10, 1956