AVClub: Some television episodes deliver big, cathartic moments. Others simply set the stage for the big moments to come, putting the pieces in motion for a big confrontation, or falling out, or romantic entanglement. With “Biden,” Casual manages to do both at once, and the results are (at this point) predictably solid. It doesn’t pack the punch of last week’s episode, but that’s all right. Tastes great, less filling.