Arizona ants mock the food chain on their way to a desert lab to get two scientists and a woman.
You can now watch Phase IV online on the following streaming providers in the United States.
| Directing | Saul Bass | Director |
| Production | Paul B. Radin | Producer |
| Sound | Brian Gascoigne | Original Music Composer |
| Editing | Willy Kemplen | Editor |
| Camera | Dick Bush | Director of Photography |
| Art | John Barry | Art Direction |
| Costume & Make-Up | Verena Coleman | Costume Design |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Directing | William P. Cartlidge | Assistant Director |
| Crew | John Richardson | Special Effects |
| Art | Saul Bass | Title Designer |
| Production | Eva Monley | Production Manager |
| Camera | Keith Hamshere | Still Photographer |
| Production | Ivo Nightingale | Location Manager |
| Sound | Norman Bolland | Sound Recordist |
| Camera | Dennis C. Lewiston | Camera Operator |
| Camera | Ken Middleham | Additional Photography |
| Art | Bill Welch | Construction Manager |
| Lighting | John Swan | Electrician |
| Art | Norman Reynolds | Assistant Art Director |
| Sound | Bob Jones | Sound Mixer |
| Production | Ron Phipps | Production Accountant |
| Crew | Jack Mills | Second Unit Cinematographer |
| Directing | Pamela Carlton | Continuity |
| Production | Alan Arnold | Publicist |
| Sound | David Vorhaus | Musician |
| Crew | Rex Neville | Special Effects |
| Sound | John Poyner | Sound Editor |
| Costume & Make-Up | Betty Glasow | Hairdresser |
| Sound | Brian Gascoigne | Conductor |
| Crew | Stomu Yamashta | Additional Music |
| Production | Iris Rose | Production Secretary |
| Writing | Mayo Simon | Writer |
