Shane Blades played two characters in this episode: Harper and Henry, mayor of the ghost town. But Shane was only credited as Harper and not Harper/Henry.
Dioni Michelle Collins was credited as Melody even thought Melody herself didn't exactly appear in this episode. Yet Dioni did appear as a citizen from the ghost town.
When the camera is at Marina's feet while she tap-dances with the female ghost, it is seen that she has a different pair of tap shoes instead of the ones she wore in Quack Shoes. She probably got a new pair of tap shoes.
Marina: Well, that would be cool, Twist, but we should just sit here calmly and drink ur smoothies and... (jumps up and begins to panic) Let us out! Somebody! Anyone! Please! Let us out! I need to get out!
(Kiki and Twist are shocked. They walk up to Marina and rub her back to calm her down)
Twist: Hey, hey, it's okay. Breathe
Marina: Guys, someone's just playing a trick on us, right?
(A ghost appears and showers Marina with flour)
Kiki: (in annoyance) Okay. Whoever you are, you don't have very nice manners!
(The ghost pours more flour on Kiki and making Marina dirtier)
Kiki: But you do have good aim.
This episode marks the first time Marina gets scared.
Marina's fear and panicky behavior probably get the best of her when trouble and/or something bad arises (especially if it's she who suggests on remaining calm). This can be shown when Marina suggests that the band remain calm after getting locked in jail by the Ghost Band, but she got so scared that she ended up panicking, leading Kiki and Twist to calm her down.