When Margaret is going over the Civil Service questions with Frank the book she is holding shows the lettering to be upside down.
Natividad Vacío appears as the same character that he played in season 3: Margaret Hires a Gardener (1957). In the season 3 show, his character is represented as 'Frank' in the credits; in this show, his character is represented as 'Fronk', even though he spells his name to the Judge as F-R-A-N-K, albeit in Spanish.