Riverdance, the Irish hard-shoe sensation that took PBS viewers by storm, underwent its second incarnation with Live from New York City, a 1996 performance filmed at Radio City Music Hall. While most of the attributes from 1995's Riverdance: The Show remain--the dazzling ensemble choreography, Bill Whelan's energetic score, and the New Age-y view of Celtic mythology--the most significant difference is at the top, where Colin Dunne replaced bombastic lead dancer Michael Flatley. Though lacking Flatley's bravura, Dunne is a superb technician who works well with Flatley's former co-lead, Jean Butler. Flamenco dancer Maria Pagis returns, as do the Riverdance Singers (formerly known as Anuna) with soloist Katie McMahon and the orchestra with fiery fiddler Eileen Ivers. About a half-hour longer than the 1995 original, Live from New York City expands upon the second act's theme of the Irish leaving their homeland