James Yagi

Dobie tries to impress Thalia by dressing as nicely as the rich Milton Armitage. A frustrated Milton doesn't know that Dobie is borrowing his duds from a local tailor.

Dobie thinks everyone has forgotten his birthday; Maynard must keep Dobie away from the house while Mrs. Gillis plans the surprise party.

In order to win Thaila from Chatsworth Osborne Jr., Dobie reads a book on mental power so he can be the dominating man that Thalia wants.

Thalia will give her love only to an athlete, so Dobie schemes to set himself up as a fearless fighter, Top Fist. But Milton Armitage, Dobie's rival for Thalia's fickle heart, calls Dobie's bluff and challenges him to a bout.

Carlos, the suave son of an Argentinian general, boards with the Gillis family and immediately wins the fickle heart of Thalia. Dobie and Maynard plot to sabotage his success.

Thalia urges Dobie to become a doctor, but he meets Zelda Gilroy and learns about the scientific concept of propinquity, the psychological tendency for people to form relationships with those whom they encounter often.