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