

The Fourth Protocol
If the Fourth Protocol is ever breached, there would be no warning, just a nuclear explosion from a bedsitter... The unthinkable has just begun.
Led by Kim Philby, Plan Aurora is a plan that breaches the top-secret Fourth Protocol and turns the fears that shaped it into a living nightmare. A crack Soviet agent, placed under cover in a quiet English country town, begins to assemble a nuclear bomb, whilst an MI5 agent attempts to prevent its detonation.
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6.3/10
215 votes
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- Status
- Released
- Budget
- $6M
- Box office
- $12.4M
- Language
- English
- cold war
- secret agent
- british spy
- female spy
- agent
- russian spy
Top billed cast
















Behind the camera
Where to watch
All optionsAvailability for United Kingdom. Provided by JustWatch through the TMDB API.
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Videos
Release dates
United StatesUS
- Theatrical28 Aug 1987
United KingdomGB
- Theatrical1520 Mar 1987
- Physical157 Sept 1987
AustraliaAU
- TheatricalM28 Jun 1987
BrazilBR
- Theatricale 141 Jan 1988
- TV14Televisão27 Nov 2003
GreeceGR
- Theatrical1610 Sept 1987
IrelandIE
- Theatrical1519 Jun 1987
ItalyIT
- Theatrical24 Sept 1987
SwedenSE
- Theatrical1522 Jun 1987
Frequently asked questions
The Fourth Protocol was released on 20 March 1987.
Audience reviews
1- C7/10
CinemaSerf
2/9/2023
There is something plausible abut Michael Caine's performance here. He ("Preston") is the antithesis of Sir Alec Guinness's "George Smiley" - a hard nosed, blunt spy catcher who hates toeing the line with his bosses. After a bit of clandestine activity, he is on his way out and is sidelined until a seemingly straightforward fatal accident gets his alarm bells ringing. Meantime, KGB agent "Petrofsky" (Pierce Brosnan) …
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