Blood Is Thicker Than the Martian

Tim's cousin Harvey is coming for a visit, which means Martin is going to have to go into hiding since Harvey would know that Tim has no Uncle Martin. And they have to keep Mrs. Brown away from Harvey since she would definitely spill the beans about Martin. Living in a small apartment, Martin can only keep away from Harvey so much, even if he is in his invisible state. And the sleeping arrangements become an issue. Those are not the only problems about Harvey's visit.