According to Tanya Lemani's autobiography "Have Belly, Will Travel," the uncredited belly dancer given as a gift to Smart at the end of the episode was played by Lemani's roommate Valya.
The first appearance of Professor Parker (Milton Selzer). Also, Patti Gilbert, who appears here as Rhonda, would go on to play the main villain in Operation Ridiculous (1968).
Barbara Feldon (99) does not appear in this episode.