Premiering immediately after "How I Met Your Mother," CBS' newest sitcom has two groups of two friends, two of whom begin dating each other. Got it? Okay, we'll do it again. See, the two guys are friends and the two girls are friends and one of the the guys starts dating one of the girls and the other guy and the other girl are just along for the ride. We don't know exactly what is going to happen to the two who aren't dating one another, but we can tell you that they start out despising each other.