'DATELINE' RETURNS TO SUNDAY NIGHTS WITH AN IN-DEPTH REPORT ON THE MYSTERIOUS POLONIUM POISIONING OF THE FORMER KGB OFFICER, ALEXANDER LITVINENKO

AMERICANS TO HEAR FROM ALL THE POTENTIAL SUSPECTS INVOLVED IN THE MURDER FOR THE FIRST TIME

Ann Curry Reports on the International Murder Investigation in "The Man Who Knew Too Much," Sunday, Feb. 25 at 7pm

NEW YORK � February 21, 2007 � The horrific killing of a former officer in Russia's notorious KGB, Alexander Litvinenko, in November 2006, the radioactive trail that followed and the international cast of potential suspects made front-page news all over the world. Now, three months later, while many questions remain unanswered, "Dateline's" Ann Curry reports on the international murder investigation surrounding this man of mystery on Sunday, Feb. 25 at 7 PM, ET.

For the in-depth report, Curry sits down for an emotional interview with Litvinenko's wife, Marina, and investigates the events that may have led to the poisoning of Litvinenko and the events that have followed both in London and Russia. In addition, the broadcast includes exclusive interviews with the Italian man Litvinenko met in the sushi restaurant and the Kremlin's archenemy, Boris Berezovsky, and for the first time, Americans will hear from all the potential suspects involved in the murder.

David Corvo is the executive producer of "Dateline NBC," (Sundays, 7:00-8:00 PM/ET).