 | Paul Fusco als ALF (voice) |
 | Miguel Ferrer als Dexter Moyers |
 | William O'Leary als Capt. Rick Mullican |
 | Jensen Daggett als Maj. Melissa Hill |
 | Martin Sheen als Colonel Gilbert Milfoil |
 | Ray Walston als Motel Manager |
 | Scott Michael Campbell als 2nd Lt. Harold Reese |
 | Beverly Archer als Dr. Carnage |
 | Charles Robinson als Dr. Stanley |
 | John Schuck als Gen. Myron Stone |
 | Gregory Alan Williams als Police Officer |
 | Liz Coke als Nina |
 | Dell Yount als Dr. Mockton |
| Dennis Creaghan als Nigel Neville |
 | Lenny Wolpe als Dr. Newman |
 | Erick Avari als Rocket (voice) |
| Michael D. Weatherred als Murphy |
 | Markus Redmond als Sgt. Rhomboid |
 | Ed Begley Jr. als Dr. Warner |
 | Lee Arenberg als Gate Guard |
 | Jeremiah Birkett als Pete Meatman |
 | W. Earl Brown als Ernie |
 | Anne Gee Byrd als Farsworth |
| John Dunbar als Man #1 |
| Billy Keane als Card Guard #1 |
 | Michael Laskin als Undermeyer |
 | Randy Oglesby als Bouncer |
| F.J. Rio als S.P. |
 | Lin Shaye als Waitress |
 | Kim Strauss als Assistant |
 | Lynn Tufeld als Cocktail Waitress |
 | Ahmet Zappa als Card Guard #2 |
| Ken Byers als Waiter |
| Dick Lowry | Director |
| Tom Patchett | Screenplay |
| Paul Fusco | Screenplay |
| Kenneth Kaufman | Executive Producer |
| Tom Patchett | Producer |
| Mark Snow | Original Music Composer |
| Henry M. Lebo | Director of Photography |
| William B. Stich | Editor |
| Paul Fusco | Executive Producer |
| Ann Kindberg | Supervising Producer |
| Ann Kindberg | Unit Production Manager |
| J. Armin Garza II | Driver |
| Debbie Smith | Associate Producer |
| Wolf Bauer | Producer |
| Junie Lowry-Johnson | Casting |
| Guy Barnes | Production Design |
| Chip Radaelli | Art Direction |
| Wendy Ozols-Barnes | Set Decoration |
| Jon Boyden | Costume Design |
| Laverne Caracuzzi | Key Makeup Artist |
| Deborah Humphries | Makeup Department Head |
| Gwyne Redner | Hairstylist |
| C.C. Barnes | Second Assistant Director |
| Catherine Bond | Second Second Assistant Director |
| Bob Dahlin | First Assistant Director |
| Barbara Benz | Property Master |
| John Bratton | Set Dresser |
| Chuck Courrieu | Set Dresser |
| Ken Masi | Construction Coordinator |
| Michael A. Patillo | Boom Operator |
| Todd Griffith | Key Grip |
| Leslie R. Morris | First Assistant Camera |
| Ralph Watson | Steadicam Operator |
| Ralph Watson | Camera Operator |
| Ron Surma | Casting Associate |
| Mace Johnson | Colorist |
| Robert McFalls | Assistant Editor |
| Marty Wereski | Music Editor |
| Anne Melville | Script Supervisor |
| Sean Whitler | Set Production Assistant |
| Steve Spiker | Extras Casting |
| Robin Wright | Costume Supervisor |
| Marjorie Kaye | Location Manager |
| Peter R. Chittell | Transportation Coordinator |
| Chuck Conway | Production Coordinator |
| Leslie Ann Podkin | Technical Advisor |
| Brad Uecker | Production Supervisor |
| Brian Bidder | Sound Mixer |
| Alan Goldenhar | Gaffer |
| Melvin Pukowsky | Electrician |
| Michael Stecher | First Assistant "B" Camera |
| Vincent Torres | Best Boy Electric |
