STRANGE TOONS: SKYWHALES

Skywhales is a 1983 short film that does a really remarkable job of depicting the culture of another world, all without a single word of human language spoken. While the look of the film is arguably a little dated, this is a brilliant example of world building, taking us to a strange and eerie place that seems like it's been around for a long time before we got there. That's Red Dwarf's Robert Llewellyn handling the hoots and grunts of the various aliens.