We’re starting our walk through Season 4! Which Expanse characters sound like they ought to be an R&B duo, and does that mean it’s time for a BUFFY-like musical episode? We talk about what a difference it makes to spend so much time on not one, not two, but three planets in a single episode, and so little on spaceships. Also on the docket: the dangerous animal magnetism of Burn Gorman, Steven Strait’s plus-10 modifiers to smiling, a couch-surfing former gunnery sergeant, and a couple of bold predictions from the podcasters who have only seen the first episode of the season…