For most of the program's time on the air, Dennis Day played a soda jerk who sang as he worked.

[2] Being the star of his own program was a departure from Day's previous experience as a regular on Benny's show.

[4] Mildred Anderson (played at different times by Bettie Miles, Barbara Eiler, and Sharon Douglas) was Day's girlfriend.

Mildred's parents, Herbert and Clara Anderson (played by Francis "Dink" Trout and Bea Benaderet, respectively), owned the boarding house in which Day lived.

Homer Willoughby (played by John Brown) owned the drugstore in which Day worked.