| Victor Garber | ... | Narrator |
| rest of cast listed alphabetically: |
 | Bob Ballard | ... | Himself (archive footage) |
| Steven Biel | ... | Himself - Author |
| Margaret Brown | ... | Herself (archive footage) |
| Daniel Allen Butler | ... | Himself - Author |
| James Cameron | ... | Himself (archive footage) |
| Ryan Cassidy | ... | Himself - Maritime Collector |
| Leighton H. Coleman III | ... | Himself - Relative of Daisy Spedden |
| Millvina Dean | ... | Herself - Titanic Survivor |
| Leonardo DiCaprio | ... | Himself (archive footage) |
| Stuart Fischoff | ... | Himself - Professor of Media Psychology (as Dr. Stuart Fischoff) |
| Bernard Fox | ... | Himself - Actor |
| Dorothy Gibson | ... | Herself - Titanic survivor (archive footage) |
| Josef Goebbels | ... | Himself (archive footage) |
| Tammy Grimes | ... | Herself - Singer / Actress |
| Charles A. Haas | ... | Himself - Author (as Charles Haas) |
| Ron Hamill | ... | Himself - Collector |
| Paul Heyer | ... | Himself - Author |
| Adolf Hitler | ... | Himself (archive footage) |
| Jonathan Hyde | ... | Himself |
| Jack Johnson | ... | Himself (archive footage) |
| Bryson Jones | ... | Himself - Owner, TechWorks |
| Kaiser Wilhelm II | ... | Himself (archive footage) |
| Edward S. Kamuda | ... | Himself - Founder / President, Titanic Historical Society, Inc. |
| John F. Kennedy | ... | (archive footage) |
| Martin Luther King | ... | (archive footage) |
| Lovetta Kramer | ... | Herself - V.P. Marketing, The Queen Mary |
| Walter Lord | ... | Himself - Author (archive footage) |
| Don Lynch | ... | Himself - Author |
| William MacQuitty | ... | Himself - Producer (archive footage) |
| John Mansworth | ... | Himself - Owner, Mansworth Pub |
| Ken Marschall | ... | Himself - Artist |
| Michael Martin | ... | Himself - Chairman, Cobh Tourism |
| David McCallum | ... | Himself - Actor |
| Michael McCaughan | ... | Himself - Senior Curator, Ulster Folk and Transport Museum |
| Roddy McDowall | ... | Himself - Actor |
| Michel 'Momon' Navratil | ... | Himself |
| Andrew Nelson | ... | Himself - CD-ROM Designer |
| Mark O'Connell | ... | Himself - General Manager, Cobh Heritage Center |
| Eddie O'Donnell | ... | Himself - Curator, Father Frances Browne Collection (as Father Eddie O'Donnell S.J.) |
| Prince Charles | ... | Himself (archive footage) |
| Arthur Rostron | ... | Himself (archive footage) |
| Gregory Shaw | ... | Himself - V.P., Butterfield & Butterfield |
| E.J. Smith | ... | Himself (archive footage) |
| Peter Stone | ... | Himself - Author |
| Gloria Stuart | ... | Herself (archive footage) |
| George Tulloch | ... | Himself - President, RMS Titanic, Inc. |
| Ralph B. White | ... | Himself - Cameraman / Explorer |
| Kate Winslet | ... | Herself (archive footage) |
| Maury Yeston | ... | Himself - Composer / Lyricist |
