They meet on an island in the Pacific and release a rabbit into the forest, and then one by one each of them has to see how long it takes them to catch it.

The CIA goes into the forest first. They place the most sensitive listening equipment every few dozen meters. They scan the forest with satellites and analyze the images with AI. They pay the birds and mice to be informants. After four weeks, they write a report saying the rabbit does not exist and has never existed.

The MI6 team goes into the forest. After a couple days with no leads they make a pot of tea and argue about cricket for a week, and then return and declare the rabbit must have escaped to another island.

The KGB goes into the forest. Two hours later they return with a bear covered with bruises and two black eyes saying: “Okay, okay, I’m a rabbit, my family are all rabbits, and everyone I know is a rabbit!”