Early in The Trip to Greece, Rob Brydon fittingly quotes Aristotle on the virtues of imitation. Although the birthplace of classical western narratives might be a perfect setting for such quotes, it also serves to shield this film against critical flak for doing just that; imitating itself.
The critics have a point, The Trip to Greece is fairly much identical to the previous three outings (set in England, Italy, and Spain). But for good reason. The formula works.
A travelogue of sorts, Rob Brydon and Steve Coogan (who play fictionalised versions of themselves) saunter from tourist site to restaurant, back to tourist site, while comically casting out quick witticisms and well-read eloquent prose about their surroundings. It's all rather idyllic and you do wonder at times if it is going anywhere beyond their conversational observations.
The plot, such that it is, is fairly scant and the thinnest of the four Trip movies. But you don't go to see a movie like this for the plot.