The name "Thalia"(Tuesday Weld's character) is from Greek mythology - she was the Muse of comedy, and, in a different persona, one of the three Graces - also, there was a well-known revival movie theater on New York City's Upper West Side called the Thalia, in operation from the 1930s to the 1980s.
The raffle rigging scheme at the center of this first proper episode of the series was reworked and used again in the final episode.
The view of the business district where Dobie and Maynard go to the movies is San Fernando Road (US 99) in San Fernando, California, a view to the East toward Brand Boulevard. The King Drug Co. neon sign at San Fernando Road and Maclay Avenue is prominent in the lower right corner of the picture.
Mr Promfritt is played Herbert Anderson. In later episodes the character is played by William Schallert.