Vic Damone receives a special guest credit at the top of the show - an insertion that is quite unusual in the series.
When Buddy and Rob sing "Doodly-doodly doo-doo-doo", they're singing Franz Schubert's song "Erlkönig", which is a song about a supernatural being on horseback that abducts children. The orchestra's transitional music to end the scene is a playful rendition of the same song.
Rob says that Sally bruises easily, like the old Russian royalty. He alludes to hemophilia.