| Tom Hanks | ... | Himself - Host | |
| Mason Adams | ... | Clinton Anderson | |
| Jo Anderson | ... | Pat White | |
| David Andrews | ... | Frank Borman | |
| Peter Anthony | ... | Engineer | |
| Donna Badger | ... | Secretary #2 | |
| Janis Benson | ... | Senator Margaret C. Smith | |
| Dan Bright | ... | Mondale's Aide | |
| Tommy Canary | ... | Simpkinson | |
| Bill Cordell | ... | Pyro Technician | |
| Ronny Cox | ... | Lee Atwood | |
| Ann Cusack | ... | Jan Armstrong | |
| Keith Dickerson | ... | Pyro Engineer | |
| J. Don Ferguson | ... | Senator Stephen Young | |
| Dann Florek | ... | Robert Seamans | |
| Ru Flynn | ... | Storms' Secretary | |
| Don Fowler | ... | Harrison Storms, Jr. | |
| Rhoda Griffis | ... | Martha Chaffee | |
| J. Michael Hunter | ... | Skip Chauvin | |
| Chris Isaak | ... | Ed White | |
| Tom Kouchalakos | ... | Technician | |
| Mitchell Laurance | ... | Bud Mahurin (as Mitchell Laurence) | |
| Dan Lauria | ... | James Webb | |
| David Lenthall | ... | Sam Beddingfield | |
| Ben Marley | ... | Roger Chaffee | |
| Dakin Matthews | ... | Dr. Floyd Thompson | |
| George Newbern | ... | Stu Roosa | |
| Holmes Osborne | ... | George Low | |
| Kevin Pollak | ... | Joe Shea | |
| Robby Preddy | ... | Phyllis Storms | |
| Kevin Rainsberger | ... | Dr. Berry | |
| James Rebhorn | ... | Harrison Storms | |
| Ruth Reid | ... | Betty Grissom | |
| Mark Rolston | ... | Gus Grissom | |
| Stephen Root | ... | Chris Kraft | |
| Nick Searcy | ... | Deke Slayton | |
| Frank Silva | ... | Levine | |
| John Slattery | ... | Walter Mondale | |
| Joe Spano | ... | George Mueller | |
| Kristin Stone | ... | Astronaut Wife | |
| Arthur Taxier | ... | Dr. Robert Van Dolah | |
| Kathy Tyrell | ... | Shea's Secretary | |
| Jonathan Aldridge | ... | Nasa Technician (uncredited) |
| Tom Hanks | ... | Himself - Host | |
| Krista Adair | ... | Jo Schirra | |
| Jay T. Becker | ... | Jim Lewis | |
| Virginia Ellen Chappell | ... | Concerned Spectator | |
| Marcelo Durst | ... | Documentary Cameraman | |
| Joe Farago | ... | Dr. Fred Kelly | |
| Lowell Fenner | ... | Russ Lawrence | |
| Keith Graham | ... | Skip Chauvin | |
| Mark Harmon | ... | Wally Schirra | |
| Holland Hayes | ... | Tech #1 | |
| Steve Hofvendahl | ... | Thomas Stafford | |
| George Hoggard | ... | EVAC Supervisor | |
| Jay Honeycutt | ... | Launch Director | |
| Peter Horton | ... | Documentary Director | |
| Daniel Hugh Kelly | ... | Gene Cernan | |
| Fredric Lehne | ... | Walt Cunningham (as Frederic Lane) | |
| Ann Magnuson | ... | Dee O'Hara | |
| Joshua Malina | ... | Tim Messick | |
| Cindy Maranne | ... | Deke's Secretary | |
| John Mese | ... | Donn Eisele | |
| Mati Moralejo | ... | Editor | |
| Philip Nolen | ... | Nerd #1 | |
| John Posey | ... | John Young | |
| Steve Purnick | ... | Clyde Teague | |
| Mark Rolston | ... | Gus Grissom | |
| Steve Sands | ... | Nerd #2 | |
| Nick Searcy | ... | Deke Slayton | |
| Brandon Smith | ... | John Healey | |
| Randy G. Stephens | ... | Curious Spectator | |
| Max Wright | ... | Guenter Wendt |
| Tom Hanks | ... | Himself - Host | |
| Remi Aubuchon | ... | Engineer Bob | |
| Reed Birney | ... | John Houbolt | |
| David Brisbin | ... | Allyn B. Hazard | |
| Max Brown | ... | Glennan | |
| Matt Craven | ... | Tom Kelly | |
| Brett Cullen | ... | Dave Scott | |
| Keith Dorman | ... | Kelly's Assistant | |
| John Drew | ... | Mylar Engineer | |
| Dann Florek | ... | Robert Seamans | |
| Randell Haynes | ... | Houbolt's Critic #1 | |
| Steve Hofvendahl | ... | Tom Stafford | |
| Clint Howard | ... | Paul Lucas | |
| Daniel Hugh Kelly | ... | Gene Cernan | |
| Paul Kiernan | ... | Glennan's Assistant | |
| Brian Lafontaine | ... | Young Engineer | |
| Mark Lainer | ... | Doubting Engineer | |
| Matthew Lussier | ... | Arnold Whitaker | |
| Phillip Martinez | ... | John Coursen | |
| Fred Mooneyham | ... | Houbolt's Critic #2 | |
| Kieran Mulroney | ... | Rusty Schweickart | |
| Dean Napolitano | ... | Seaman's Assistant | |
| John Nutten | ... | Colleague #1 | |
| Conor O'Farrell | ... | James McDivitt | |
| Holmes Osborne | ... | George Low | |
| Stan Petter | ... | Colleague #2 | |
| Alan Ruck | ... | Tom Dolan | |
| Nick Searcy | ... | Deke Slayton | |
| Grant Shaud | ... | Bob Carbee | |
| Russell Warner | ... | John Rigsby | |
| Norbert Weisser | ... | Werner Von Braun | |
| Graham Yost | ... | Engineer Dave |
| Tom Hanks | ... | Himself - Host | |
| Sam Anderson | ... | Thomas Paine | |
| David Andrews | ... | Frank Borman | |
| Roger Bernard | ... | CONTROL | |
| Betsy Brantley | ... | Jan Armstrong | |
| Tom Brooks | ... | Jack Garman | |
| Dan Butler | ... | Gene Kranz | |
| Joe Candelora | ... | Cameraman | |
| Bryan Cranston | ... | Buzz Aldrin | |
| J. Downing | ... | CAPCOM | |
| Cary Elwes | ... | Michael Collins | |
| Timothy A. Franta | ... | SURGEON | |
| David Drew Gallagher | ... | RETRO | |
| Tony Goldwyn | ... | Neil Armstrong | |
| Daniel Hagen | ... | Honeycutt (as Dan Hagen) | |
| Don Harvey | ... | Flight Director | |
| Bill Leavy | ... | GNC | |
| Mikki Scanlon | ... | Pat Collins (as Mikki McKeever) | |
| Timothy McLaughlin | ... | TELMU | |
| Andy Milder | ... | GUIDO | |
| Jeffrey Parrish | ... | BOOSTER | |
| Michael Rafferty | ... | Back Room Man #2 | |
| Roger Ranney | ... | Back Room Man #1 | |
| Diana Scarwid | ... | Joan Aldrin | |
| Nick Searcy | ... | Deke Slayton | |
| Robert Serwatka | ... | EE COM | |
| Lane Smith | ... | Emmett Seaborn | |
| Jack Swanson | ... | Priest | |
| John Wickersham | ... | FIDO | |
| Rita Wilson | ... | Susan Borman |
| Tom Hanks | ... | Himself - Host | |
| Jeff Breslauer | ... | Technician | |
| David Clyde Carr | ... | Gerry Griffin | |
| George Colangelo | ... | 'Buck' Willoughby | |
| Dave Foley | ... | Alan Bean | |
| Jim Leavy | ... | C.C. Williams | |
| Ben Marley | ... | Roger Chaffee | |
| Paul McCrane | ... | Pete Conrad | |
| Geoffrey Nauffts | ... | Ed Gibson | |
| Mike Pniewski | ... | Flight Surgeon | |
| Shawn Pyfrom | ... | Ten Year Old Boy | |
| Gary Rorman | ... | Geologist | |
| Lane Smith | ... | Emmett Seaborn | |
| John Travis | ... | John Aaron | |
| Tom Verica | ... | Dick Gordon |
| Tom Hanks | ... | Himself - Host | |
| Tammy Arnold | ... | Sarah | |
| Rus Blackwell | ... | Joel Kruger (as Rus D. Blackwell) | |
| Brian Brightman | ... | Editor | |
| Dan Butler | ... | Gene Kranz | |
| Jack Carroll | ... | Reporter #3 | |
| Colette Piceau | ... | Reporter #4 (as Colette Piceau Colangelo) | |
| Heather De Oreo | ... | Doris (as Heather DeOreo) | |
| Steve DuMouchel | ... | Jeff Jordy | |
| Jeffrey William Evans | ... | Director (as Jeff Evans) | |
| Billy Flanigan | ... | Suit #2 | |
| Harold Fletcher | ... | Dr. Swigert | |
| Tim Goodwin | ... | Mr. Radio | |
| Erich Hoffelder | ... | Brett's Soundman | |
| John Hostetter | ... | Ralph Cooper | |
| Clint Howard | ... | Paul Lucas | |
| Key Howard | ... | Reporter #5 | |
| John M. Jackson | ... | Hal Deacon | |
| Kathy Karol | ... | Shirley | |
| David Kaufman | ... | David Gibson | |
| William Larson | ... | Seymour Rosen | |
| Michael Laskin | ... | Larry Thompson | |
| Christopher Miles | ... | TV #3 | |
| Jay Mohr | ... | Brett Hutchins | |
| Jeff Moldovan | ... | Reporter #7 | |
| Dennis Neal | ... | Suit #1 | |
| Don C. Noderer | ... | TV #1 | |
| Conor O'Farrell | ... | James McDivitt | |
| Janet Peterson | ... | Mrs. Swigert | |
| Ethan Phillips | ... | Stanley Craig | |
| Ric Reitz | ... | Reporter #8 | |
| Brett Rice | ... | Sam Langfitt | |
| Stephen Root | ... | Chris Kraft | |
| John Rothman | ... | Warren Moburg | |
| Paul Rouffa | ... | Mr. AP | |
| Gerard Russell | ... | Suit #3 | |
| Nick Searcy | ... | Deke Slayton | |
| Lane Smith | ... | Emmett Seaborn | |
| Catherine Stork | ... | TV #4 | |
| Jan Taylor | ... | TV #2 | |
| Todd Thompson | ... | TV #5 | |
| Doug Truelsen | ... | Mr. UPI (as Doug Truelson) | |
| Cyndi Vicino | ... | Reporter #2 | |
| Dave Wagner | ... | Anchor | |
| George Wilson | ... | Reporter #6 |
| Tom Hanks | ... | Himself - Host | |
| Dylan Baker | ... | Bruce McCoy | |
| Adam Baldwin | ... | Fred Haise | |
| David Clyde Carr | ... | Gerry Griffin | |
| Gary Cole | ... | Ed Mitchell | |
| Tim Daly | ... | Jim Lovell | |
| Joanna Garcia | ... | Julie Shepard | |
| Henderson Gilliland | ... | Bud (as Henderson Gilleland) | |
| Jerry Hardin | ... | Ben Taylor | |
| Michael Harding | ... | Dick Thorson (as Mike Harding) | |
| Steve Hofvendahl | ... | Tom Stafford | |
| Chris Hogan | ... | Don Eyles | |
| Gwen Hollander | ... | Laura Shepard | |
| Daniel Hugh Kelly | ... | Gene Cernan | |
| David Kelsey | ... | GUIDO | |
| J. LaRose | ... | Anesthesiologist | |
| Ted Levine | ... | Alan Shepard | |
| Andrew Masset | ... | Dr. House (as Andrew Massett) | |
| George Newbern | ... | Stu Roosa | |
| Robin O'Dell | ... | Gaye Alford | |
| Kim Ostrenko | ... | Louise Shepard | |
| Jeffrey Pillars | ... | Charlie (as Jeff Pillars) | |
| Caroline Ross | ... | Scrub Nurse | |
| Andrew Rubin | ... | Jules Bergman | |
| Nick Searcy | ... | Deke Slayton | |
| Tom Stearns | ... | Dick (as Tom I. Stearns) | |
| Marty Stonerock | ... | Circulating Nurse | |
| Lesa Thurman | ... | Joan Roosa | |
| Robert C. Treveiler | ... | L. Gordon Cooper (as Robert Treveiler) | |
| Rick Warner | ... | Julian Bowman | |
| Ashleigh Ann Wood | ... | Alice Shepard (as Ashley Ann Wood) |
| Tom Hanks | ... | Himself - Host | |
| Tom Amandes | ... | Jack Schmitt | |
| John Aylward | ... | Dr. Ray Pemberton | |
| Barry Bell | ... | Rocco Petrone | |
| David Clyde Carr | ... | Gerry Griffin | |
| David Clennon | ... | Lee Silver | |
| Brett Cullen | ... | Dave Scott | |
| Keith Flippen | ... | Jason | |
| Joe Inscoe | ... | Chester Lee | |
| Marc Macaulay | ... | Karl Heinze (as Marc Macauley) | |
| Doug McKeon | ... | Joe Allen | |
| Tim Parati | ... | Blaisdell | |
| Michael Raynor | ... | Al Worden | |
| Arland Russell | ... | Geology Professor | |
| Nick Searcy | ... | Deke Slayton | |
| Isa Totah | ... | Farouk El-Baz | |
| Tom Verica | ... | Dick Gordon | |
| Gareth Williams | ... | Jim Irwin |
| Tom Hanks | ... | Himself - Host | |
| Jo Anderson | ... | Pat White | |
| David Andrews | ... | Frank Borman | |
| Katie Austin | ... | Susan Lovell | |
| Robert Catrini | ... | Reporter #48 | |
| Wendy Crewson | ... | Faye Stafford | |
| Ann Cusack | ... | Jan Armstrong | |
| Tim Daly | ... | Jim Lovell | |
| J. Downing | ... | Charlie Duke | |
| Sally Field | ... | Trudy Cooper | |
| R. Keith Harris | ... | Charlie (as Keith Harris) | |
| Jim Helsinger | ... | PAO | |
| John Michael Higgins | ... | Master of Ceremonies | |
| Kristie Horton | ... | Barbara Lovell | |
| Key Howard | ... | Reporter #1 | |
| Zeljko Ivanek | ... | Ken Mattingly | |
| Elliot Kachnycz | ... | Jay Lovell | |
| DeLane Matthews | ... | Pat McDivitt (as Delane Matthews) | |
| Claudia Miller | ... | Reporter #72 | |
| John Mountford | ... | Christopher Conrad | |
| Deirdre O'Connell | ... | Barbara Young (as Deidre O'Connell) | |
| Elizabeth Perkins | ... | Marilyn Lovell | |
| John Posey | ... | John Young | |
| Debra Jo Rupp | ... | Marilyn See | |
| Cynthia Stevenson | ... | Jane Conrad | |
| Robert C. Treveiler | ... | L. Gordon Cooper | |
| JoBeth Williams | ... | Marge Slayton (as Jobeth Williams) | |
| Rita Wilson | ... | Susan Borman | |
| Jonathan Aldridge | ... | Reporter (uncredited) | |
| Chris Isaak | ... | Ed White (voice) (uncredited) | |
| Conor O'Farrell | ... | Jim McDivitt (voice) (uncredited) |
| Tom Amandes | ... | Jack Schmitt | |
| Bart Braverman | ... | Older Sahjid | |
| David Clyde Carr | ... | Gerry Griffin | |
| David Clennon | ... | Lee Silver | |
| Blythe Danner | ... | Narrator | |
| Chris Ellis | ... | Bob Parker | |
| Keith Flippen | ... | Jason | |
| Tom Hanks | ... | Jean-Luc Despont | |
| George Kapetan | ... | Ed Fendell | |
| Tchéky Karyo | ... | George Melies (as Tcheky Karyo) | |
| Daniel Hugh Kelly | ... | Gene Cernan | |
| Jason Khoury | ... | Young Sahjid | |
| Elizabeth Morehead | ... | Tracy Cernan | |
| Tim Parati | ... | Blaisdell | |
| J.C. Quinn | ... | Special Effects Worker | |
| Michael Roddy | ... | Geologist | |
| Stephen Root | ... | Chris Kraft | |
| Nick Searcy | ... | Deke Slayton | |
| Lane Smith | ... | Emmett Seaborn |
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