S1·E17 The Odd Couple

When Elizabeth's apartment is damaged by a fire, Kirk insists that she move in with him and the kids while her place is being repaired. Unfortunately, Kirk and she discover just how different they really are. Elizabeth insists on cleaning and organizing everything, while Kirk hates being neat. Just before Kirk's surprise birthday party the two get into a fight, and Elizabeth leaves. Later, they apologize to each other and kiss. Kirk decides that being different may not be completely bad.