 Matthew ModineDr. Don Francis | Dr. Don Francis |
 Alan AldaDr. Robert Gallo | Dr. Robert Gallo |
 Patrick BauchauDr. Luc Montagnier | Dr. Luc Montagnier |
 Nathalie BayeDr. Françoise Barre | Dr. Françoise Barre |
 Christian ClemensonDr. Dale Lawrence | Dr. Dale Lawrence |
 David ClennonMr. Johnstone | Mr. Johnstone |
 Phil CollinsEddi Papasano | Eddi Papasano |
 Bud CortAntique Shop Owner | Antique Shop Owner |
 Alex CourtneyDr. Mika Popovic | Dr. Mika Popovic |
 David DukesDr. Mervyn Silverman | Dr. Mervyn Silverman |
 Richard GereThe Choreographer | The Choreographer |
 David Marshall GrantDennis Seeley | Dennis Seeley |
 Ronald GuttmanDr. Jean-Claude Chermann | Dr. Jean-Claude Chermann |
 Glenne HeadlyDr. Mary Guinan | Dr. Mary Guinan |
 Anjelica HustonDr. Betsy Reisz | Dr. Betsy Reisz |
 Ken JenkinsDr. Dennis Donohue | Dr. Dennis Donohue |
 Richard JenkinsDr. Marc Conant | Dr. Marc Conant |
 Tchéky KaryoDr. Willy Rozenbaum | Dr. Willy Rozenbaum |
 Swoosie KurtzMrs. Johnstone | Mrs. Johnstone |
 Jack LauferMrs. Johnstone | Mrs. Johnstone |
 Donal LogueBobbi Campbell | Bobbi Campbell |
 Steve MartinThe Brother | The Brother |
 Richard MasurWilliam W. Darrow, PhD | William W. Darrow, PhD |
 Dakin MatthewsCongressman Phil Burton | Congressman Phil Burton |
 Ian McKellenBill Kraus | Bill Kraus |
 Peter McRobbieDr. Max Essex | Dr. Max Essex |
 Lawrence MonosonChip | Chip |
 Jeffrey NordlingGaetan Dugas | Gaetan Dugas |
 Saul RubinekDr. Jim Curran | Dr. Jim Curran |
 Charles Martin SmithDr. Harold Jaffe | Dr. Harold Jaffe |
