 Joey receives a letter from his lost friend Steve, whom hasn t seen since 20 years ago. But Joey isn t happy at all, because in that time Steve simply goes without saying a word. When Steve arrives, everyone is surprised because he looks awful, like a "homeless", quoting Gina. In fact, Gina is quite nervous because of the presence of Steve. Just before, she told Alex that she had a romantic relationship with Steve in the past. So, when Steve shows up, Gina tells him in private that Joey doesn t know anything about their relationship from the past. But Gina and Steve want to start making out again at Michael s bedroom. Joey enters in the room at the same time and finds out that his sister and his best friend had a romantic thing. Steve explains that that was the reason because he never say good bye, he was afraid of telling him about his relationship with Gina. Now Joey s very angry, but after he remembers old times with Steve, they make up again. However, Joey and Gina see that Steve and Michael have the same mannerisms and personality. Besides, Michael is 22-years-old, the same time that Gina and Steve see each other for the last time. Both Michael and Steve are genius. After having solved one physics problem, and answered some questions about chemistry with Steve, Michael finds out that Steve is his real father.