Newly-promoted if none too happily married Howard Brubaker (Jack Lemmon) leaves a rowdy Company party early with the stunning Catherine (Catherine Deneuve), whom it turns out is herself unhappily married - to the boss. They spend an innocent night in New York becoming more and more attracted to each other, so that when Catherine announces she intends to leave her husband and return to Paris Howard asks to go along too. In the cold light of morning problems and pressures from spouses crowd in.

United Nations Plaza and East 48th Street, Manhattan.

Catherine's Workplace, 866 United Nations Plaza and East 48th Street, Manhattan.

Howard's Workplace, 140 Broadway and Liberty Street, Manhattan.

Naumburg Bandshell, Central Park, Manhattan.

Pond (Near Gapstow Bridge) Central Park, Manhattan.

Zoo, Central Park (near 5th Avenue) Manhattan.

Delmonico's Bar, 56 Beaver Street and William Street, Manhattan.

TWA Terminal, JFK International Airport, Jamaica, Queens.