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 |
| Editing | Willy Kemplen | Editor |
| Production | Paul B. Radin | Producer |
| Camera | Dick Bush | Director of Photography |
| Costume & Make-Up | Verena Coleman | Costume Design |
| Art | John Barry | Art Direction |
| Costume & Make-Up | Freddie Williamson | Makeup Artist |
| Sound | Norman Bolland | Sound Recordist |
| Directing | William P. Cartlidge | Assistant Director |
| Crew | John Richardson | Special Effects |
| Camera | Keith Hamshere | Still Photographer |
| Production | Eva Monley | Production Manager |
| Camera | Dennis C. Lewiston | Camera Operator |
| Costume & Make-Up | Rosemary Burrows | Wardrobe Supervisor |
| Art | Saul Bass | Title Designer |
| Production | Ivo Nightingale | Location Manager |
| Sound | Bob Jones | Sound Mixer |
| Art | Bill Welch | Construction Manager |
| Sound | Brian Gascoigne | Conductor |
| Production | Ron Phipps | Production Accountant |
| Crew | Stomu Yamashta | Additional Music |
| Art | Norman Reynolds | Assistant Art Director |
| Camera | Ken Middleham | Additional Photography |
| Sound | David Vorhaus | Musician |
| Production | Alan Arnold | Publicist |
| Crew | Rex Neville | Special Effects |
| Costume & Make-Up | Betty Glasow | Hairdresser |
| Crew | Jack Mills | Second Unit Cinematographer |
| Directing | Pamela Carlton | Continuity |
| Lighting | John Swan | Electrician |
| Sound | John Poyner | Sound Editor |
| Production | Iris Rose | Production Secretary |
| Writing | Mayo Simon | Writer |
