If one listens closely to the phrasing, ambience and vocal performance of Ann Morgan Guilbert's 'Sentimental Love Song (My Love Got A Smash in the Face)' during the auditions, it is evident that her's was one of the few examples of a live singing performance on the series, without being pre-recorded or dubbed.
In the special features section of this episode on the DVD series collection, there is a rare color photograph of the set and characters during Mel's (Richard Deacon) ventriloquist audition. Mel and his dummy are wearing bright red jackets, Rob is wearing a dark blue jacket and light blue pants, Jerry is wearing green, Anita's dress is blue and Sally's dress is gold.
Sylvia Lewis (who played "Anita") was the ex-wife of John Rich, who was a frequent director of The Dick Van Dyke Show. He did not direct this one though.
The choreography and costumes for "A Doodlin' Song" was inspired by "Steam Heat," a number from the 1954 musical The Pajama Game, choreographed by Bob Fosse.
Sylvia Lewis choreographed both musical numbers, uncredited.