This week, I am sorry to tell you, we aren't actually talking about cats. (Boo.) What we are talking about is the fraught matters of borders and boundaries, identity and institutions – whether the city is one entity or many, and who it is who gets to decide.
Barbara and I begin by discussing one of our (my) favourite questions: where does London end? Or Southampton? Or New York, Shanghai or Paris, come to that? These questions aren't just of interest to map nerds: they have a real impact on how cities relate to their suburbs, and the authorities within them relate to each other. So Tim Fendley from Applied Wayfinding, who you might remember from episode 3, pops in to tell us about his adventures trying to get the various transport bodies to work together in Toronto.
Next, our occasional Americas correspondent Drew Reed tells us about his city. Los Angeles was made by the car – but its long demolished streetcar network might yet save it from snarl ups.
And finally, given our topic, what else could we choose as our map of the week? It’s that time we imposed a map of Paris on one of London for a giggle. Enjoy the show.
Skylines is the podcast from CityMetric, the New Statesman cities site. It's presented by Jonn Elledge and Barbara Speed, and is a Roifield Brown production.