Phase IV poster
Where to stream

Phase IV

6.319741h 26mPGMovieHorrorScience Fiction

Arizona ants mock the food chain on their way to a desert lab to get two scientists and a woman.

DirectorSaul Bass
WriterMayo Simon
ProducerPaul B. Radin

Where to watch

Paramount PlusParamount PlusParamount+ Amazon ChannelParamount+ Amazon ChannelParamount Plus PremiumParamount Plus PremiumParamount Plus Basic with AdsParamount Plus Basic with Ads
Availability shown for United Kingdom · rights vary by country

Cast · Directed by Saul Bass

NDNigel Davenport
Nigel Davenport
Dr. Ernest D. Hubbs
MMMichael Murphy
Michael Murphy
James R. Lesko
LFLynne Frederick
Lynne Frederick
Kendra Eldridge
AGAlan Gifford
Alan Gifford
Mr. Eldridge
RHRobert Henderson
Robert Henderson
Clete
HHHelen Horton
Helen Horton
Mildred Eldridge
DHDavid Healy
David Healy
Radio Announcer (voice) (uncredited)

More from Nigel Davenport · Lead actor

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More from Michael Murphy · Co-star actor

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More from Saul Bass · Director

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Phase IV — streaming FAQ

Which OTT platform streams Phase IV?

Phase IV is streaming on Paramount Plus, Paramount+ and Paramount Plus Premium in United Kingdom, and available to rent or buy on JustWatch TV and Apple TV Store. It's not currently on Netflix.

Is Phase IV on Netflix?

No, Phase IV is not on Netflix in United Kingdom as of October 2026. It's currently on Paramount Plus and Paramount+.

Is Phase IV on Amazon Prime Video?

No, Phase IV isn't on Amazon Prime Video in United Kingdom right now. It's on Paramount Plus and Paramount+ instead.

Where can I watch Phase IV for free?

Phase IV is available on Paramount Plus and Paramount+ in United Kingdom, but you'll need an active subscription — there's no free option right now.