Door 16 / Arnold As Cupid

S1 E10: The boarders are all suspicious of the mysterious Mr. Smith who lives behind door 16. He has a private bathroom and takes all his meals alone. A package arrives for Mr. Smith and Arnold must defend the package from the boarders who think it might hold the secret to Mr. Smith's identity. Oscar Kokoshka moves in with Arnold when his wife, Susie, throws him out of their apartment following another fight. Arnold resolves to get the two back together again after his new "roomie" starts to drive him crazy!