Episode #304 "Dick-In-Law"

Dick answers Mary's phone at the office and accepts an invitation for the two of them to spend the weekend with Mary's parents who aren't aware that Dick and Mary have broken up; Mary is frantic when she finds out but agrees to go and pretend they're still engaged. Dick had promised Nina he'd help her move over the weekend, so he enlists the other aliens to help her. Dick is desperate to win the respect and approval of Mary's parents (George and Martha), and they seem to warm to him immediately, but it quickly becomes apparent that the parents are a bit bizarre and have an adversarial relationship that they make no effort to hide. To Mary's horror, George relates to Dick in excruciating detail embarrassing moments from Mary's girlhood, and Mary's mortified, but Dick tells Mary he really likes her parents. Mary feels compelled to tell Dick some family secrets that change his attitude about George and Martha, and Dick immediately confronts them which leads to a huge argument between the parents. Dick is completely freaked out by the family drama, but Mary and her parents are grateful that it's all out in the open.