Gregory Peck, David Niven, Roger Moore, Trevor Howard and a group of middle aged British actors.

Being unaware of this movie set in India in 1943, I noticed it was done well. But the story and characters seemed like a mediocre script writer’s effort written and produced to do a World War Two story to compete the spy thrillers in 1980.
NOPE, the story is TRUE, and events happened as casually, awkwardly and as surprising as shown, likely with little input from the script writer’s craft.

One set of images, as an undercurrent, is also present. The British in India, and their elevated, privileged place in society held by Britons, the last vintages of colonialism. Within four years the British were removed and India and its people were free.
Since the events are true, it is a movie to see.