After I had read this late Graham Greene novel years ago, I was immediately fascinated by its le Carré-like plot with very much Greene-like characters. I immediately thought that this should have been made into a movie.
Shortly afterwards, I learnt that Preminger had already made it into a film back in 1979, so I was of course very eager to see this movie. Yet - this film has fallen into oblivion, it is not commercially available and it is hardly ever on TV.
Very strange if you consider that it features a cast bristling with splendid British character actors (Nicol Williamson, Derek Jacobi, Robert Morley, Richard Attenborough, to name but a few) and has a screenplay by Tom Stoppard (which IMHO was a straightforward, enjoyable transfer of Greene's novel to the screen).
So, only yesterday did I have the opportunity to watch it on TV. Certainly, it is no cinematographic highlight: it is very low-key, very unfussily directed by Otto Preminger in a more than plain style, and has basically no "action" (but then - what would you expect of a Greene novel?). It might as well have been made for TV, but this impression may also be due to the serious budget problems while filming.
However, it has some splendid performances by actors whom I could watch all day long. The mere cast turns this film into a success and makes it worthwhile watching.