In een woestijn in Amerika worden de mieren ineens veel slimmer dan normaal. Een groep wetenschappers bestudeert het gedrag van de mieren. Ze komen erachter dat het gedrag van de mieren verandert en een kat en muis spel begint.
Nee, helaas is Phase IV nog niet beschikbaar op Netflix in Nederland.
| Directing | Saul Bass | Director |
| Sound | Brian Gascoigne | Original Music Composer |
| Camera | Dick Bush | Director of Photography |
| Editing | Willy Kemplen | Editor |
| Production | Paul B. Radin | Producer |
| Art | John Barry | Art Direction |
| Costume & Make-Up | Verena Coleman | Costume Design |
| Sound | Norman Bolland | Sound Recordist |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Camera | Keith Hamshere | Still Photographer |
| Production | Ivo Nightingale | Location Manager |
| Crew | John Richardson | Special Effects |
| Camera | Dennis C. Lewiston | Camera Operator |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Production | Eva Monley | Production Manager |
| Directing | William P. Cartlidge | Assistant Director |
| Art | Saul Bass | Title Designer |
| Sound | David Vorhaus | Musician |
| Production | Alan Arnold | Publicist |
| Crew | Jack Mills | Second Unit Cinematographer |
| Directing | Pamela Carlton | Continuity |
| Sound | Bob Jones | Sound Mixer |
| Sound | John Poyner | Sound Editor |
| Costume & Make-Up | Betty Glasow | Hairdresser |
| Art | Norman Reynolds | Assistant Art Director |
| Production | Ron Phipps | Production Accountant |
| Crew | Stomu Yamashta | Additional Music |
| Crew | Rex Neville | Special Effects |
| Production | Iris Rose | Production Secretary |
| Camera | Ken Middleham | Additional Photography |
| Art | Bill Welch | Construction Manager |
| Sound | Brian Gascoigne | Conductor |
| Lighting | John Swan | Electrician |
| Writing | Mayo Simon | Writer |
